{"id":"CVE-2026-112911","published":"2026-10-20T15:17:15.473","lastModified":"2026-10-21T21:21:20.163","description":"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.","cvssScore":6.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H","cwes":["CWE-283"],"vendors":["tox-dev"],"products":["filelock"],"references":[{"url":"https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03","tags":["Patch"]},{"url":"https://github.com/tox-dev/filelock/pull/839","tags":["Patch"]},{"url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","tags":["Release Notes"]},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","tags":["Exploit","Mitigation","Patch","Vendor Advisory"]}],"exploitRefs":[{"url":"https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03","tags":["Patch"]},{"url":"https://github.com/tox-dev/filelock/pull/839","tags":["Patch"]},{"url":"https://github.com/tox-dev/filelock/releases/tag/4.2.1","tags":["Release Notes"]},{"url":"https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4","tags":["Exploit","Mitigation","Patch","Vendor Advisory"]}],"hasPoc":true,"ai":null}