{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-112909","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-19T20:16:09.857Z","datePublished":"2026-10-20T14:16:02.317Z","dateUpdated":"2026-10-22T21:25:25.906Z"},"containers":{"cna":{"title":"filelock: UnixFileLock truncates and chmods any regular file another user renames or hard-links onto the lock path","problemTypes":[{"descriptions":[{"cweId":"CWE-706","lang":"en","description":"CWE-706: Use of Incorrectly-Resolved Name or Reference","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/tox-dev/filelock/security/advisories/GHSA-69hj-f68j-2879","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-69hj-f68j-2879"},{"name":"https://github.com/tox-dev/filelock/pull/835","tags":["x_refsource_MISC"],"url":"https://github.com/tox-dev/filelock/pull/835"},{"name":"https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a","tags":["x_refsource_MISC"],"url":"https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536c0a"},{"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":"< 4.2.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-20T14:16:02.317Z"},"descriptions":[{"lang":"en","value":"filelock is a platform-independent file lock for Python. Prior to 4.2.1, UnixFileLock can truncate a regular file renamed onto the lock path when another local user has actual rename permission, or hard-linked there under a permissive hard-link policy; when an explicit mode is requested, affected versions from 3.10.2 can also change that file's mode. This issue is fixed in version 4.2.1."}],"source":{"advisory":"GHSA-69hj-f68j-2879","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-69hj-f68j-2879","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-22T21:24:59.918929Z","id":"CVE-2026-112909","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":"2026-10-22T21:25:25.906Z"}}]}}