{"items":[{"id":"NVI-00009107","kind":"vulnerability","title":"CKEditor: Cross-site scripting (XSS) in the engine package","revision":6,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-rh54-vffm-5fvp","CVE-2026-116688"],"plain_summary":"GitHub lists this reviewed advisory for ckeditor5, @ckeditor/ckeditor5-engine, ckeditor5, @ckeditor/ckeditor5-engine. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-13bf9430ddc07334c13b697573b83643"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-27T21:05:07.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b45b458fc407346915ad251c6925d2c4"},{"kind":"CVSS","as_of":"2026-11-02T20:17:33.097Z","value":"8.1 HIGH (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-7a2018772e46be8d8cfa917ac84e8142"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.497%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.42783. Missing scores are unknown.","source_id":"sr-13bf9430ddc07334c13b697573b83643"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b45b458fc407346915ad251c6925d2c4","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-5722fb20693630c22a1367a51748cd86","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-02T02:21:04.757Z"},{"id":"sr-7a2018772e46be8d8cfa917ac84e8142","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-116688","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-116688","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-03T09:59:08.616Z"},{"id":"sr-13bf9430ddc07334c13b697573b83643","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-116688","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:58:50.314Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]}],"null_published_at":"2026-11-08T15:11:49.360Z","source_updated_at":"2026-10-27T21:05:07.000Z","source_disclosed_at":"2026-10-27T21:05:06.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00009107","kind":"vulnerability","title":"CKEditor: Cross-site scripting (XSS) in the engine package","revision":5,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-rh54-vffm-5fvp","CVE-2026-116688"],"plain_summary":"GitHub lists this reviewed advisory for ckeditor5, @ckeditor/ckeditor5-engine, ckeditor5, @ckeditor/ckeditor5-engine. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-13bf9430ddc07334c13b697573b83643"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-27T21:05:07.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b45b458fc407346915ad251c6925d2c4"},{"kind":"EPSS","as_of":"2026-11-04T12:03:12.000Z","value":"0.497%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.42783. Missing scores are unknown.","source_id":"sr-13bf9430ddc07334c13b697573b83643"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b45b458fc407346915ad251c6925d2c4","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-5722fb20693630c22a1367a51748cd86","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-02T02:21:04.757Z"},{"id":"sr-13bf9430ddc07334c13b697573b83643","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-116688","publisher":"FIRST EPSS","observed_at":"2026-11-04T17:58:50.314Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]}],"null_published_at":"2026-11-08T08:10:32.028Z","source_updated_at":"2026-10-27T21:05:07.000Z","source_disclosed_at":"2026-10-27T21:05:06.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00009107","kind":"vulnerability","title":"CKEditor: Cross-site scripting (XSS) in the engine package","revision":4,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-rh54-vffm-5fvp","CVE-2026-116688"],"plain_summary":"GitHub lists this reviewed advisory for ckeditor5, @ckeditor/ckeditor5-engine, ckeditor5, @ckeditor/ckeditor5-engine. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-223024ccbb525e3024245c24ce2fe785"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-27T21:05:07.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b45b458fc407346915ad251c6925d2c4"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.497%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.42663. Missing scores are unknown.","source_id":"sr-223024ccbb525e3024245c24ce2fe785"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b45b458fc407346915ad251c6925d2c4","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-5722fb20693630c22a1367a51748cd86","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-02T02:21:04.757Z"},{"id":"sr-223024ccbb525e3024245c24ce2fe785","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-116688","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.267Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]}],"null_published_at":"2026-11-04T18:04:03.169Z","source_updated_at":"2026-10-27T21:05:07.000Z","source_disclosed_at":"2026-10-27T21:05:06.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00009107","kind":"vulnerability","title":"CKEditor: Cross-site scripting (XSS) in the engine package","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-rh54-vffm-5fvp","CVE-2026-116688"],"plain_summary":"GitHub lists this reviewed advisory for ckeditor5, @ckeditor/ckeditor5-engine, ckeditor5, @ckeditor/ckeditor5-engine. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-199d3df27533b530686f5f16e928fd5c"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 47.7.4 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for ckeditor5. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"The original advisory lists fixed boundaries 48.5.1 for @ckeditor/ckeditor5-engine. Confirm the publisher’s latest guidance.","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"action_type":"vendor_patch","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-27T21:05:07.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b45b458fc407346915ad251c6925d2c4"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.497%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.42669. Missing scores are unknown.","source_id":"sr-199d3df27533b530686f5f16e928fd5c"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b45b458fc407346915ad251c6925d2c4","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-5722fb20693630c22a1367a51748cd86","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-02T02:21:04.757Z"},{"id":"sr-199d3df27533b530686f5f16e928fd5c","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-116688","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 45.0.0; fixed 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-5722fb20693630c22a1367a51748cd86"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":["SEMVER: introduced 48.0.0; fixed 48.5.1"]}],"null_published_at":"2026-11-02T20:21:10.345Z","source_updated_at":"2026-10-27T21:05:07.000Z","source_disclosed_at":"2026-10-27T21:05:06.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00009107","kind":"vulnerability","title":"CKEditor: Cross-site scripting (XSS) in the engine package","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-rh54-vffm-5fvp","CVE-2026-116688"],"plain_summary":"GitHub lists this reviewed advisory for ckeditor5, @ckeditor/ckeditor5-engine, ckeditor5, @ckeditor/ckeditor5-engine. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-199d3df27533b530686f5f16e928fd5c"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-27T21:05:07.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b45b458fc407346915ad251c6925d2c4"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.497%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.42669. Missing scores are unknown.","source_id":"sr-199d3df27533b530686f5f16e928fd5c"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b45b458fc407346915ad251c6925d2c4","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"},{"id":"sr-199d3df27533b530686f5f16e928fd5c","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-116688","publisher":"FIRST EPSS","observed_at":"2026-10-31T22:06:15.374Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]}],"null_published_at":"2026-10-31T22:27:09.599Z","source_updated_at":"2026-10-27T21:05:07.000Z","source_disclosed_at":"2026-10-27T21:05:06.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-10-31T21:56:36.327Z"},{"id":"NVI-00009107","kind":"vulnerability","title":"CKEditor: Cross-site scripting (XSS) in the engine package","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-rh54-vffm-5fvp","CVE-2026-116688"],"plain_summary":"GitHub lists this reviewed advisory for ckeditor5, @ckeditor/ckeditor5-engine, ckeditor5, @ckeditor/ckeditor5-engine. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-10-27T21:05:07.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-b45b458fc407346915ad251c6925d2c4"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-b45b458fc407346915ad251c6925d2c4","url":"https://github.com/advisories/GHSA-rh54-vffm-5fvp","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-rh54-vffm-5fvp","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T21:56:36.327Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 45.0.0, < 47.7.4"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"ckeditor5","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]},{"certainty":"source_listed","source_ids":["sr-b45b458fc407346915ad251c6925d2c4"],"technology":"@ckeditor/ckeditor5-engine","known_exclusions":[],"conditions_summary":"### Impact\nA Cross-Site Scripting (XSS) vulnerability has been discovered in the CKEditor 5 engine. This vulnerability is caused by a prototype pollution issue in the `es-toolkit` library used in the CKEditor 5 codebase. This vulnerability could lead to unauthorized JavaScript code execution when the editor processes incoming `style` attribute values.\n\nThe underlying issue has been patched by the library maintainers, and the fix has been incorporated into CKEditor 5.\n\n### Patches\nThe problem has been recognized and patched. The fix will be available in version `48.5.1` (and above) and `47.7.4` (LTS).\n\n### For more information\nEmail us at security@cksource.com if you have any questions or comments about this advisory.","public_affected_ranges":[">= 48.0.0, < 48.5.1"]}],"null_published_at":"2026-10-31T22:13:31.283Z","source_updated_at":"2026-10-27T21:05:07.000Z","source_disclosed_at":"2026-10-27T21:05:06.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T21:56:36.327Z"}],"next_cursor":null,"snapshot_revision":"42594"}