{"items":[{"id":"NVI-00007239","kind":"vulnerability","title":"TYPO3 CMS Possible Insecure Deserialization in Extbase Request Handling","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hh95-5xm5-v8v7"],"plain_summary":"OSV carries this publisher advisory for typo3/cms, typo3/cms. 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 8.7.30 for typo3/cms. Confirm the publisher’s latest guidance.","source_ids":["sr-d49a1255a1b9fc582a0f1273279e15a1"],"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 9.5.12 for typo3/cms. Confirm the publisher’s latest guidance.","source_ids":["sr-d49a1255a1b9fc582a0f1273279e15a1"],"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-d49a1255a1b9fc582a0f1273279e15a1","url":"https://github.com/advisories/GHSA-hh95-5xm5-v8v7","basis":"vendor_advisory","notes":"GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.","title":"GHSA-hh95-5xm5-v8v7","publisher":"GitHub Advisory Database via OSV","observed_at":"2026-10-31T21:42:20.429Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-d49a1255a1b9fc582a0f1273279e15a1"],"technology":"typo3/cms","known_exclusions":[],"conditions_summary":"It has been discovered that request handling in Extbase can be vulnerable to insecure deserialization. User submitted payload has to be signed with a corresponding HMAC-SHA1 using the sensitive TYPO3 encryptionKey as secret - invalid or unsigned payload is not deserialized.\n\nHowever, since sensitive information could have been leaked by accident (e.g. in repositories or in commonly known and unprotected backup files), there is the possibility that attackers know the private encryptionKey and are able to calculate the required HMAC-SHA1 to allow a malicious payload to be deserialized.\n\nRequirements for successfully exploiting this vulnerability (all of the following):\n\n- rendering at least one Extbase plugin in the frontend\n- encryptionKey has been leaked (from LocalConfiguration.php or corresponding .env file)","public_affected_ranges":["ECOSYSTEM: introduced 8.0.0; fixed 8.7.30"]},{"certainty":"source_listed","source_ids":["sr-d49a1255a1b9fc582a0f1273279e15a1"],"technology":"typo3/cms","known_exclusions":[],"conditions_summary":"It has been discovered that request handling in Extbase can be vulnerable to insecure deserialization. User submitted payload has to be signed with a corresponding HMAC-SHA1 using the sensitive TYPO3 encryptionKey as secret - invalid or unsigned payload is not deserialized.\n\nHowever, since sensitive information could have been leaked by accident (e.g. in repositories or in commonly known and unprotected backup files), there is the possibility that attackers know the private encryptionKey and are able to calculate the required HMAC-SHA1 to allow a malicious payload to be deserialized.\n\nRequirements for successfully exploiting this vulnerability (all of the following):\n\n- rendering at least one Extbase plugin in the frontend\n- encryptionKey has been leaked (from LocalConfiguration.php or corresponding .env file)","public_affected_ranges":["ECOSYSTEM: introduced 9.0.0; fixed 9.5.12"]}],"null_published_at":"2026-10-31T22:13:14.318Z","source_updated_at":"2024-12-04T05:40:21.293Z","source_disclosed_at":"2024-06-07T17:07:03.000Z","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":"2026-10-31T21:42:20.429Z"}],"next_cursor":null,"snapshot_revision":"40769"}