{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-112939","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-19T21:30:47.245Z","datePublished":"2026-10-20T14:38:52.373Z","dateUpdated":"2026-10-20T15:14:56.836Z"},"containers":{"cna":{"title":"filelock: SoftFileLock removes a live holder's marker when another user forges the PID in a writable marker","problemTypes":[{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":4.7,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/tox-dev/filelock/security/advisories/GHSA-rfpc-qcw5-3pc4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-rfpc-qcw5-3pc4"},{"name":"https://github.com/tox-dev/filelock/pull/836","tags":["x_refsource_MISC"],"url":"https://github.com/tox-dev/filelock/pull/836"},{"name":"https://github.com/tox-dev/filelock/commit/eeceaa846cbe4df72718d94c8371ca1ab8f5b3cc","tags":["x_refsource_MISC"],"url":"https://github.com/tox-dev/filelock/commit/eeceaa846cbe4df72718d94c8371ca1ab8f5b3cc"},{"name":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","tags":["x_refsource_MISC"],"url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1"}],"affected":[{"vendor":"tox-dev","product":"filelock","versions":[{"version":">= 3.22.0, < 4.2.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-20T14:38:52.373Z"},"descriptions":[{"lang":"en","value":"filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can trust a forged process identifier in a marker that an attacker can modify but cannot remove, allowing an authorized contender such as another process of the holder's account or root to act as a confused deputy, remove the live marker, and admit another holder. This issue is fixed in version 4.2.1."}],"source":{"advisory":"GHSA-rfpc-qcw5-3pc4","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-rfpc-qcw5-3pc4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T15:14:32.481979Z","id":"CVE-2026-112939","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-20T15:14:56.836Z"}}]}}