{"schema":"threatline.record/2","record":{"id":"CVE-2026-112911","aliases":["GHSA-9c4x-gm8v-wgc4"],"summary":"filelock: StrictSoftFileLock and SoftReadWriteLock adopt a protocol directory another user created first, losing mutual exclusion","details":"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.","categories":["Unclassified"],"product":"filelock","vendor":"tox-dev","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-112911","source_modified_at":"2026-10-20T14:21:24.480Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"filelock","vendor":"tox-dev","versions":[{"status":"affected","version":">= 3.30.0, < 4.2.1"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","source_modified_at":"2026-10-20T14:20:20Z","fetched_at":"2026-10-23T21:10:45.942435Z","package":{"ecosystem":"pip","name":"filelock"},"range":">= 3.30.0, <= 4.2.0"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","source_modified_at":"2026-10-20T14:20:20Z","fetched_at":"2026-10-23T21:10:45.942435Z","package":{"ecosystem":"pip","name":"filelock"},"version":"4.2.1"}],"cvss":6.3,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00107,"percentile":0.011,"score_date":"2026-10-23"},"published_at":"2026-10-20T14:21:24.480Z","modified_at":"2026-10-20T14:21:24.480Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-112911","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T14:21:24.480Z"},{"source":"GitHub Advisory Database","url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","fetched_at":"2026-10-23T21:10:45.942435Z","source_modified_at":"2026-10-20T14:20:20Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-112911","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/tox-dev/filelock/pull/839","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-20T14:21:24.480Z","content_hash":"4e13c0e97f4beb55052627e49225490e0bac17efa36f3adc2e3776330d3f021b"}}