{"id":"CVE-2026-112915","title":"filelock ReadWriteLock: a crafted lock database makes every acquire stall or hang regardless of timeout","summary":"filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock can open a crafted SQLite lock database without bounding schema and query work, allowing another local user who can replace the database to m…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-400"],"vendor":"tox-dev","product":"filelock","affected":["filelock >= 3.20.4, < 4.2.1"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-20T15:25:17.769823Z"},"exploitAvailable":true,"published":"2026-10-20","updated":"2026-10-20","sourceUpdated":"2026-10-20T15:25:38.592Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112915","references":[{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-cwqr-hh33-gh44","label":"https://github.com/tox-dev/filelock/security/advisories/GHSA-cwqr-hh33-gh44"},{"url":"https://github.com/tox-dev/filelock/pull/834","label":"https://github.com/tox-dev/filelock/pull/834"},{"url":"https://github.com/tox-dev/filelock/commit/5e3f2ec0c5fb17cb2635b60b2b68bc63ab81ca2d","label":"https://github.com/tox-dev/filelock/commit/5e3f2ec0c5fb17cb2635b60b2b68bc63ab81ca2d"},{"url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","label":"https://github.com/tox-dev/filelock/releases/tag/4.2.1"}],"tags":["cve.org","exploit-available"],"ingestedAt":"2026-10-20T15:09:24.125Z","slug":"CVE-2026-112915","body":"## Overview\n\nfilelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock can open a crafted SQLite lock database without bounding schema and query work, allowing another local user who can replace the database to make acquisition stall or hang; versions from 3.20.4 expose this on initial per-instance opening, and versions from 3.30.0 repeat the exposure on every acquisition. This issue is fixed in version 4.2.1.\n\n## Affected\n\n- `filelock >= 3.20.4, < 4.2.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":225966,"id":"CVE-2026-112915","ts":1792512733020,"field":"exploit_available","old":"false","new":"true"}]}