{"items":[{"id":"NVI-00003652","kind":"vulnerability","title":"Grav has Unauthenticated Path Traversal & Arbitrary File Write in its FormFlash component","revision":3,"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-hmcx-ch82-3fv2","CVE-2026-42608"],"plain_summary":"GitHub lists this reviewed advisory for getgrav/grav. 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-3364365cc35a5e0f68acf06aec2e66f8"],"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 2.0.0-beta.2 for getgrav/grav. Confirm the publisher’s latest guidance.","source_ids":["sr-46473cf200e3c51350ba8cfeee967dca"],"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":"2026-10-26T18:10:00.173Z","value":"9.1 CRITICAL (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-3364365cc35a5e0f68acf06aec2e66f8"},{"kind":"CVSS","as_of":"2026-10-26T18:10:00.173Z","value":"8.8 HIGH (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-3364365cc35a5e0f68acf06aec2e66f8"}],"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-682144b5e0ab7ee21086bef6894bbbc2","url":"https://github.com/advisories/GHSA-hmcx-ch82-3fv2","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-hmcx-ch82-3fv2","publisher":"GitHub Advisory Database","observed_at":"2026-11-08T15:08:00.152Z"},{"id":"sr-46473cf200e3c51350ba8cfeee967dca","url":"https://github.com/advisories/GHSA-hmcx-ch82-3fv2","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hmcx-ch82-3fv2","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.430Z"},{"id":"sr-3364365cc35a5e0f68acf06aec2e66f8","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42608","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-42608","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:02.489Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-682144b5e0ab7ee21086bef6894bbbc2"],"technology":"getgrav/grav","known_exclusions":[],"conditions_summary":"# Vulnerability Report: Grav CMS Unauthenticated Path Traversal & Arbitrary File Write\n\n**[ZERO-DAY] Unauthenticated Path Traversal leading to Arbitrary Directory Creation and Configuration Injection**\n\n## Summary\n\nGrav CMS (v1.7.49.5 and latest development source) is vulnerable to a Zero-Day Path Traversal vulnerability within the FormFlash core component. By manipulating the session_id (passed as `__form-flash-id` in POST requests), an unauthenticated attacker can traverse the filesystem to create arbitrary directories and write an `index.yaml` file containing attacker-controlled data.\n\nThis vulnerability can lead to unauthorized modification of application behavior, potential data integrity issues, and service disruption in production environments.\n\n## Affected Component\n\n- Versions: Confirmed in Grav v1.7.49.5 (latest stable) and the latest development source (March 2026).\n- Class: `Grav\\Framework\\Form\\FormFlash`\n- Method: `__construct()` / `getTmpDir()`\n- Parameter: `session_id` (Mapped to `__form-flash-id` in POST requests)\n\n## Vulnerability Details\n\nThe FormFlash class is used to persist form data across redirects. It constructs a temporary storage path using the provided se","public_affected_ranges":["< 2.0.0-beta.2"]},{"certainty":"source_listed","source_ids":["sr-46473cf200e3c51350ba8cfeee967dca"],"technology":"getgrav/grav","known_exclusions":[],"conditions_summary":"# Vulnerability Report: Grav CMS Unauthenticated Path Traversal & Arbitrary File Write\n\n**[ZERO-DAY] Unauthenticated Path Traversal leading to Arbitrary Directory Creation and Configuration Injection**\n\n## Summary\n\nGrav CMS (v1.7.49.5 and latest development source) is vulnerable to a Zero-Day Path Traversal vulnerability within the FormFlash core component. By manipulating the session_id (passed as `__form-flash-id` in POST requests), an unauthenticated attacker can traverse the filesystem to create arbitrary directories and write an `index.yaml` file containing attacker-controlled data.\n\nThis vulnerability can lead to unauthorized modification of application behavior, potential data integrity issues, and service disruption in production environments.\n\n## Affected Component\n\n- Versions: Confirmed in Grav v1.7.49.5 (latest stable) and the latest development source (March 2026).\n- Class: `Grav\\Framework\\Form\\FormFlash`\n- Method: `__construct()` / `getTmpDir()`\n- Parameter: `session_id` (Mapped to `__form-flash-id` in POST requests)\n\n## Vulnerability Details\n\nThe FormFlash class is used to persist form data across redirects. It constructs a temporary storage path using the provided se","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 2.0.0-beta.2"]}],"null_published_at":"2026-11-08T15:11:47.511Z","source_updated_at":"2026-05-13T13:52:36.000Z","source_disclosed_at":"2026-05-05T21:34:58.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:20.430Z"},{"id":"NVI-00003652","kind":"vulnerability","title":"Grav has Unauthenticated Path Traversal & Arbitrary File Write in its FormFlash component","revision":2,"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-hmcx-ch82-3fv2","CVE-2026-42608"],"plain_summary":"OSV carries this publisher advisory for getgrav/grav. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.0.0-beta.2 for getgrav/grav. Confirm the publisher’s latest guidance.","source_ids":["sr-46473cf200e3c51350ba8cfeee967dca"],"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":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-3364365cc35a5e0f68acf06aec2e66f8"],"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":"2026-10-26T18:10:00.173Z","value":"9.1 CRITICAL (3.1)","meaning":"nvd@nist.gov severity; no combined Null risk score.","source_id":"sr-3364365cc35a5e0f68acf06aec2e66f8"},{"kind":"CVSS","as_of":"2026-10-26T18:10:00.173Z","value":"8.8 HIGH (4.0)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-3364365cc35a5e0f68acf06aec2e66f8"}],"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-46473cf200e3c51350ba8cfeee967dca","url":"https://github.com/advisories/GHSA-hmcx-ch82-3fv2","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hmcx-ch82-3fv2","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.430Z"},{"id":"sr-3364365cc35a5e0f68acf06aec2e66f8","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42608","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-42608","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-01T07:24:02.489Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-46473cf200e3c51350ba8cfeee967dca"],"technology":"getgrav/grav","known_exclusions":[],"conditions_summary":"# Vulnerability Report: Grav CMS Unauthenticated Path Traversal & Arbitrary File Write\n\n**[ZERO-DAY] Unauthenticated Path Traversal leading to Arbitrary Directory Creation and Configuration Injection**\n\n## Summary\n\nGrav CMS (v1.7.49.5 and latest development source) is vulnerable to a Zero-Day Path Traversal vulnerability within the FormFlash core component. By manipulating the session_id (passed as `__form-flash-id` in POST requests), an unauthenticated attacker can traverse the filesystem to create arbitrary directories and write an `index.yaml` file containing attacker-controlled data.\n\nThis vulnerability can lead to unauthorized modification of application behavior, potential data integrity issues, and service disruption in production environments.\n\n## Affected Component\n\n- Versions: Confirmed in Grav v1.7.49.5 (latest stable) and the latest development source (March 2026).\n- Class: `Grav\\Framework\\Form\\FormFlash`\n- Method: `__construct()` / `getTmpDir()`\n- Parameter: `session_id` (Mapped to `__form-flash-id` in POST requests)\n\n## Vulnerability Details\n\nThe FormFlash class is used to persist form data across redirects. It constructs a temporary storage path using the provided se","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 2.0.0-beta.2"]}],"null_published_at":"2026-11-01T14:34:07.619Z","source_updated_at":"2026-09-10T03:51:05.981Z","source_disclosed_at":"2026-05-05T21:34:58.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T21:42:20.430Z"},{"id":"NVI-00003652","kind":"vulnerability","title":"Grav has Unauthenticated Path Traversal & Arbitrary File Write in its FormFlash component","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hmcx-ch82-3fv2","CVE-2026-42608"],"plain_summary":"OSV carries this publisher advisory for getgrav/grav. This is an aggregated source copy; consult the original publisher and compare update dates.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"The original advisory lists fixed boundaries 2.0.0-beta.2 for getgrav/grav. Confirm the publisher’s latest guidance.","source_ids":["sr-46473cf200e3c51350ba8cfeee967dca"],"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":[],"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-46473cf200e3c51350ba8cfeee967dca","url":"https://github.com/advisories/GHSA-hmcx-ch82-3fv2","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hmcx-ch82-3fv2","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.430Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-46473cf200e3c51350ba8cfeee967dca"],"technology":"getgrav/grav","known_exclusions":[],"conditions_summary":"# Vulnerability Report: Grav CMS Unauthenticated Path Traversal & Arbitrary File Write\n\n**[ZERO-DAY] Unauthenticated Path Traversal leading to Arbitrary Directory Creation and Configuration Injection**\n\n## Summary\n\nGrav CMS (v1.7.49.5 and latest development source) is vulnerable to a Zero-Day Path Traversal vulnerability within the FormFlash core component. By manipulating the session_id (passed as `__form-flash-id` in POST requests), an unauthenticated attacker can traverse the filesystem to create arbitrary directories and write an `index.yaml` file containing attacker-controlled data.\n\nThis vulnerability can lead to unauthorized modification of application behavior, potential data integrity issues, and service disruption in production environments.\n\n## Affected Component\n\n- Versions: Confirmed in Grav v1.7.49.5 (latest stable) and the latest development source (March 2026).\n- Class: `Grav\\Framework\\Form\\FormFlash`\n- Method: `__construct()` / `getTmpDir()`\n- Parameter: `session_id` (Mapped to `__form-flash-id` in POST requests)\n\n## Vulnerability Details\n\nThe FormFlash class is used to persist form data across redirects. It constructs a temporary storage path using the provided se","public_affected_ranges":["ECOSYSTEM: introduced 0; fixed 2.0.0-beta.2"]}],"null_published_at":"2026-10-31T22:12:48.025Z","source_updated_at":"2026-09-10T03:51:05.981Z","source_disclosed_at":"2026-05-05T21:34:58.000Z","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":"2026-10-31T21:42:20.430Z"}],"next_cursor":null,"snapshot_revision":"42594"}