CVE-2026-112940

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.

• CWE-363
• CWE-59

• https://github.com/tox-dev/filelock/commit/5e3f2ec0c5fb17cb2635b60b2b68bc63ab81ca2dPatch
• https://github.com/tox-dev/filelock/pull/834Patch
• https://github.com/tox-dev/filelock/releases/tag/4.2.1Release Notes
• https://github.com/tox-dev/filelock/security/advisories/GHSA-v4x8-3wr5-3wq8Exploit, Mitigation, Patch, Vendor Advisory
• https://github.com/tox-dev/filelock/security/advisories/GHSA-v4x8-3wr5-3wq8Exploit, Mitigation, Patch, Vendor Advisory

Published

Oct 20, 2026

Last Modified

Oct 22, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-112934filelock is a platform-independent file lock for Python. Fro…6.1
• CVE-2026-112935filelock is a platform-independent file lock for Python. Fro…4.7
• CVE-2026-112936filelock is a platform-independent file lock for Python. Fro…6.1
• CVE-2026-112937filelock is a platform-independent file lock for Python. Fro…6.1
• CVE-2026-112939filelock is a platform-independent file lock for Python. Fro…4.7
• CVE-2026-11294Inappropriate implementation in Passwords in Google Chrome p…4.3
• CVE-2026-112941filelock is a platform-independent file lock for Python. Fro…3.3
• CVE-2026-112942launch-editor allows users to open files with line numbers i…7.5
• CVE-2026-112943launch-editor allows users to open files with line numbers i…6.3
• CVE-2026-112944launch-editor allows users to open files with line numbers i…6.3
• CVE-2026-112945Vite is a frontend tooling framework for JavaScript. Prior t…2.1
• CVE-2026-112946Vite is a frontend tooling framework for JavaScript. Prior t…6.3