{"id":"CVE-2026-112906","published":"2026-10-20T15:17:15.163","lastModified":"2026-10-20T19:48:50.250","description":"filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftFileLock versions from 4.1.0 can reuse a stale observation when an attacker pre-dates and removes its own marker, at least two lock-user processes are waiting, coarse or matching modification times preserve the observation, and an honest contender creates a fresh marker on the reused inode, causing that live marker to be removed as stale. This issue is fixed in version 4.2.1.","cvssScore":4.7,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-694"],"vendors":[],"products":[],"references":[{"url":"https://github.com/tox-dev/filelock/commit/740ff666b62a88496c8d7394e4e6230605e4d62b","tags":[]},{"url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","tags":[]},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-2g95-wg33-c5x2","tags":[]},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-2g95-wg33-c5x2","tags":[]}],"exploitRefs":[{"url":"https://github.com/tox-dev/filelock/commit/740ff666b62a88496c8d7394e4e6230605e4d62b","tags":[]},{"url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","tags":[]},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-2g95-wg33-c5x2","tags":[]},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-2g95-wg33-c5x2","tags":[]}],"hasPoc":true,"ai":null}