{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-112912","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-19T20:16:09.858Z","datePublished":"2026-10-20T14:23:18.993Z","dateUpdated":"2026-10-20T15:37:56.208Z"},"containers":{"cna":{"title":"filelock: Symlink swap during SoftFileLock's writability check leaks whether a path exists and is writable by the lock taker","problemTypes":[{"descriptions":[{"cweId":"CWE-59","lang":"en","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":2.5,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9j6q-wvj5-jgjg","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9j6q-wvj5-jgjg"},{"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":">= 3.32.6, < 4.2.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-20T14:23:18.993Z"},"descriptions":[{"lang":"en","value":"filelock is a platform-independent file lock for Python. From 3.32.6 until 4.2.1, SoftFileLock can follow a swapped symbolic link during the conditional os.access writability check for a node without its owner-write bit, allowing another local user on a platform and directory configuration that follows the link to infer whether a chosen path exists and is writable from the observable acquisition result. This issue is fixed in version 4.2.1."}],"source":{"advisory":"GHSA-9j6q-wvj5-jgjg","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9j6q-wvj5-jgjg","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-20T15:37:27.795354Z","id":"CVE-2026-112912","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":"2026-10-20T15:37:56.208Z"}}]}}