{"schema":"threatline.record/2","record":{"id":"CVE-2026-112939","aliases":["GHSA-rfpc-qcw5-3pc4"],"summary":"filelock: SoftFileLock removes a live holder's marker when another user forges the PID in a writable marker","details":"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.","categories":["Unclassified"],"product":"filelock","vendor":"tox-dev","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-112939","source_modified_at":"2026-10-20T15:14:56.836Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"filelock","vendor":"tox-dev","versions":[{"version":">= 3.22.0, < 4.2.1","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":4.7,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.0014,"percentile":0.03023,"score_date":"2026-10-23"},"published_at":"2026-10-20T14:38:52.373Z","modified_at":"2026-10-20T15:14:56.836Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-112939","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-20T15:14:56.836Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-112939","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-rfpc-qcw5-3pc4","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/tox-dev/filelock/pull/836","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/tox-dev/filelock/commit/eeceaa846cbe4df72718d94c8371ca1ab8f5b3cc","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","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-20T15:14:32.481979Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-20T15:14:56.836Z","content_hash":"8183bd54b19dacd27b00c3bf322c565c7b1deabd526783f18da89dd9dca869a5"}}