{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-112911","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-19T20:16:09.858Z","datePublished":"2026-10-20T14:21:24.480Z","dateUpdated":"2026-10-28T15:09:43.507Z"},"containers":{"cna":{"title":"filelock: StrictSoftFileLock and SoftReadWriteLock adopt a protocol directory another user created first, losing mutual exclusion","problemTypes":[{"descriptions":[{"cweId":"CWE-283","lang":"en","description":"CWE-283: Unverified Ownership","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":6.3,"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:H","version":"3.1"}}],"references":[{"name":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","tags":["x_refsource_CONFIRM"],"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4"},{"name":"https://github.com/tox-dev/filelock/pull/839","tags":["x_refsource_MISC"],"url":"https://github.com/tox-dev/filelock/pull/839"},{"name":"https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03","tags":["x_refsource_MISC"],"url":"https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03"},{"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":">= 3.30.0, < 4.2.1","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-20T14:21:24.480Z"},"descriptions":[{"lang":"en","value":"filelock is a platform-independent file lock for Python. From 3.30.0 until 4.2.1, StrictSoftFileLock versions from 3.30.0 and SoftReadWriteLock versions from 4.0.0 can adopt a protocol directory created first by another local user in a shared parent directory, allowing that user to alter protocol state and admit concurrent holders. This issue is fixed in version 4.2.1."}],"source":{"advisory":"GHSA-9c4x-gm8v-wgc4","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-28T15:09:37.663560Z","id":"CVE-2026-112911","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":"2026-10-28T15:09:43.507Z"}}]}}