{"items":[{"id":"NVI-00011846","kind":"vulnerability","title":"ApostropheCMS sanitize-html: unbounded recursion when re-sanitizing the fallback of a discarded iframe (stack overflow, nestingLimit not enforced)","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-c9rx-x947-fp3h","CVE-2026-113650"],"plain_summary":"GitHub lists this reviewed advisory for sanitize-html. 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-821fd4148a9587a540a948415ddba1b0"],"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 2.18.1 for sanitize-html. Confirm the publisher’s latest guidance.","source_ids":["sr-c8840f0ee66eb8e245d19a8cc225bf87"],"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":"2026-10-21T17:05:02.000Z","value":"5.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-430501ba12762891f247e1100395f541"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.480%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.4142. Missing scores are unknown.","source_id":"sr-821fd4148a9587a540a948415ddba1b0"}],"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-430501ba12762891f247e1100395f541","url":"https://github.com/advisories/GHSA-c9rx-x947-fp3h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-c9rx-x947-fp3h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:39.183Z"},{"id":"sr-c8840f0ee66eb8e245d19a8cc225bf87","url":"https://github.com/advisories/GHSA-c9rx-x947-fp3h","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-c9rx-x947-fp3h","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-11-07T13:55:34.195Z"},{"id":"sr-821fd4148a9587a540a948415ddba1b0","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-2026-113650","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.067Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-430501ba12762891f247e1100395f541"],"technology":"sanitize-html","known_exclusions":[],"conditions_summary":"### Summary\n\nSince 2.18.0, when an `` is not allowed and `disallowedTagsMode` is `'discard'` (the defaults),\nits raw-text content is re-sanitized by a recursive call to `sanitizeHtml(text, options)` (the change\nfrom #5564, fixing #5550). The recursion has no bound and starts each nested call with a fresh state.\nTwo consequences, both absent from 2.17.7 and 2.17.4:\n\n1. A few kilobytes of unclosed `` tags throw `RangeError: Maximum call stack size exceeded`\n   with the default options. Any application that sanitizes untrusted HTML with 2.18.0 can be made to\n   throw on a small crafted input.\n2. `nestingLimit` is not enforced across a discarded iframe: each nested iframe restarts the depth\n   count at zero, so the output can be nested arbitrarily deep regardless of the configured limit.\n\n### Affected versions\n\n- 2.18.0 (the current `latest`), and the `main` branch at the time of writing (the recursive call is\n  still in `packages/sanitize-html/index.js`, in the `ontext` handler, branch\n  `tag === 'iframe' && !tagAllowed(tag) && options.disallowedTagsMode === 'discard'`).\n- Not affected: 2.17.7 and 2.17.4 (tested with the same inputs below).\n\nTested with Node.js v26.7.0","public_affected_ranges":[">= 2.18.0, < 2.18.1"]},{"certainty":"source_listed","source_ids":["sr-c8840f0ee66eb8e245d19a8cc225bf87"],"technology":"sanitize-html","known_exclusions":[],"conditions_summary":"### Summary\n\nSince 2.18.0, when an `` is not allowed and `disallowedTagsMode` is `'discard'` (the defaults),\nits raw-text content is re-sanitized by a recursive call to `sanitizeHtml(text, options)` (the change\nfrom #5564, fixing #5550). The recursion has no bound and starts each nested call with a fresh state.\nTwo consequences, both absent from 2.17.7 and 2.17.4:\n\n1. A few kilobytes of unclosed `` tags throw `RangeError: Maximum call stack size exceeded`\n   with the default options. Any application that sanitizes untrusted HTML with 2.18.0 can be made to\n   throw on a small crafted input.\n2. `nestingLimit` is not enforced across a discarded iframe: each nested iframe restarts the depth\n   count at zero, so the output can be nested arbitrarily deep regardless of the configured limit.\n\n### Affected versions\n\n- 2.18.0 (the current `latest`), and the `main` branch at the time of writing (the recursive call is\n  still in `packages/sanitize-html/index.js`, in the `ontext` handler, branch\n  `tag === 'iframe' && !tagAllowed(tag) && options.disallowedTagsMode === 'discard'`).\n- Not affected: 2.17.7 and 2.17.4 (tested with the same inputs below).\n\nTested with Node.js v26.7.0","public_affected_ranges":["SEMVER: introduced 2.18.0; fixed 2.18.1"]}],"null_published_at":"2026-11-08T08:10:35.856Z","source_updated_at":"2026-10-21T17:05:02.000Z","source_disclosed_at":"2026-10-21T17:05:01.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T23:13:39.183Z"},{"id":"NVI-00011846","kind":"vulnerability","title":"ApostropheCMS sanitize-html: unbounded recursion when re-sanitizing the fallback of a discarded iframe (stack overflow, nestingLimit not enforced)","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-c9rx-x947-fp3h","CVE-2026-113650"],"plain_summary":"GitHub lists this reviewed advisory for sanitize-html. 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-821fd4148a9587a540a948415ddba1b0"],"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":"2026-10-21T17:05:02.000Z","value":"5.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-430501ba12762891f247e1100395f541"},{"kind":"EPSS","as_of":"2026-10-31T12:00:27.000Z","value":"0.480%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.4142. Missing scores are unknown.","source_id":"sr-821fd4148a9587a540a948415ddba1b0"}],"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-430501ba12762891f247e1100395f541","url":"https://github.com/advisories/GHSA-c9rx-x947-fp3h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-c9rx-x947-fp3h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:39.183Z"},{"id":"sr-821fd4148a9587a540a948415ddba1b0","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-2026-113650","publisher":"FIRST EPSS","observed_at":"2026-11-01T01:39:43.067Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-430501ba12762891f247e1100395f541"],"technology":"sanitize-html","known_exclusions":[],"conditions_summary":"### Summary\n\nSince 2.18.0, when an `` is not allowed and `disallowedTagsMode` is `'discard'` (the defaults),\nits raw-text content is re-sanitized by a recursive call to `sanitizeHtml(text, options)` (the change\nfrom #5564, fixing #5550). The recursion has no bound and starts each nested call with a fresh state.\nTwo consequences, both absent from 2.17.7 and 2.17.4:\n\n1. A few kilobytes of unclosed `` tags throw `RangeError: Maximum call stack size exceeded`\n   with the default options. Any application that sanitizes untrusted HTML with 2.18.0 can be made to\n   throw on a small crafted input.\n2. `nestingLimit` is not enforced across a discarded iframe: each nested iframe restarts the depth\n   count at zero, so the output can be nested arbitrarily deep regardless of the configured limit.\n\n### Affected versions\n\n- 2.18.0 (the current `latest`), and the `main` branch at the time of writing (the recursive call is\n  still in `packages/sanitize-html/index.js`, in the `ontext` handler, branch\n  `tag === 'iframe' && !tagAllowed(tag) && options.disallowedTagsMode === 'discard'`).\n- Not affected: 2.17.7 and 2.17.4 (tested with the same inputs below).\n\nTested with Node.js v26.7.0","public_affected_ranges":[">= 2.18.0, < 2.18.1"]}],"null_published_at":"2026-11-04T02:53:08.398Z","source_updated_at":"2026-10-21T17:05:02.000Z","source_disclosed_at":"2026-10-21T17:05:01.000Z","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":"2026-10-31T23:13:39.183Z"},{"id":"NVI-00011846","kind":"vulnerability","title":"ApostropheCMS sanitize-html: unbounded recursion when re-sanitizing the fallback of a discarded iframe (stack overflow, nestingLimit not enforced)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-c9rx-x947-fp3h","CVE-2026-113650"],"plain_summary":"GitHub lists this reviewed advisory for sanitize-html. 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-430501ba12762891f247e1100395f541"],"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":"2026-10-21T17:05:02.000Z","value":"5.3 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-430501ba12762891f247e1100395f541"}],"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-430501ba12762891f247e1100395f541","url":"https://github.com/advisories/GHSA-c9rx-x947-fp3h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-c9rx-x947-fp3h","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:39.183Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-430501ba12762891f247e1100395f541"],"technology":"sanitize-html","known_exclusions":[],"conditions_summary":"### Summary\n\nSince 2.18.0, when an `` is not allowed and `disallowedTagsMode` is `'discard'` (the defaults),\nits raw-text content is re-sanitized by a recursive call to `sanitizeHtml(text, options)` (the change\nfrom #5564, fixing #5550). The recursion has no bound and starts each nested call with a fresh state.\nTwo consequences, both absent from 2.17.7 and 2.17.4:\n\n1. A few kilobytes of unclosed `` tags throw `RangeError: Maximum call stack size exceeded`\n   with the default options. Any application that sanitizes untrusted HTML with 2.18.0 can be made to\n   throw on a small crafted input.\n2. `nestingLimit` is not enforced across a discarded iframe: each nested iframe restarts the depth\n   count at zero, so the output can be nested arbitrarily deep regardless of the configured limit.\n\n### Affected versions\n\n- 2.18.0 (the current `latest`), and the `main` branch at the time of writing (the recursive call is\n  still in `packages/sanitize-html/index.js`, in the `ontext` handler, branch\n  `tag === 'iframe' && !tagAllowed(tag) && options.disallowedTagsMode === 'discard'`).\n- Not affected: 2.17.7 and 2.17.4 (tested with the same inputs below).\n\nTested with Node.js v26.7.0","public_affected_ranges":[">= 2.18.0, < 2.18.1"]}],"null_published_at":"2026-11-01T01:03:56.610Z","source_updated_at":"2026-10-21T17:05:02.000Z","source_disclosed_at":"2026-10-21T17:05:01.000Z","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":"2026-10-31T23:13:39.183Z"}],"next_cursor":null,"snapshot_revision":"42594"}