{"id":"CVE-2026-112940","revision":"e8973efacb8240ea8919b94243639c4e","records":[{"revision":"e8973efacb8240ea8919b94243639c4e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-112940","aliases":[],"title":"filelock ReadWriteLock: SQLite reopens the lock database by name, so a planted symlink or journal file makes the lock user's process overwrite or unlink its own files","description":"filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock let SQLite reopen the database and side files by name; on POSIX systems an attacker with rename access in a non-sticky parent can swap those names to cause overwrite or unlink operations, while a writable adjacent hot journal is additionally required for attacker-chosen content overwrites. This issue is fixed in version 4.2.1.","state":0,"publishedAt":"2026-10-20T14:41:49.555+00:00","modifiedAt":"2026-10-22T21:29:27.209+00:00","affected":[{"ecosystem":"Vendor product","name":"filelock","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"tox-dev\",\n                    \"product\": \"filelock\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 3.20.4, < 4.2.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":7.1,"severity":"HIGH"}],"references":["https://github.com/tox-dev/filelock/security/advisories/GHSA-v4x8-3wr5-3wq8","https://github.com/tox-dev/filelock/pull/834","https://github.com/tox-dev/filelock/commit/5e3f2ec0c5fb17cb2635b60b2b68bc63ab81ca2d","https://github.com/tox-dev/filelock/releases/tag/4.2.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-112940","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-112940","identifiers":["CVE-2026-112940"]},"retained":false,"historicalAffected":[]}],"coverage":[]}