CVE-2026-112908 | BDVDB-2026-400730 Detail
tox-devfilelock
Description#
filelock is a platform-independent file lock for Python. From version 3.30.0 until version 4.2.1, StrictSoftFileLock and AsyncStrictSoftFileLock on POSIX systems create coordination and claim directories without applying the caller’s restrictive lock mode. A permissive umask or inherited default ACL can leave these directories writable by another local user, allowing that user to delete an active holder’s claims. Another authorized process can then acquire the lock while the original holder remains in its critical section. An attacker can also plant malformed claims to prevent acquisition. This issue is fixed in version 4.2.1.
Impact#
Per CVSS v3.1: confidentiality impact none, integrity impact high, availability impact low. Attack vector: local.
Weaknesses#
- CWE-732 Incorrect Permission Assignment for Critical Resource
References#
- https://github.com/tox-dev/filelock/security/advisories/GHSA-6627-m3xw-93mp
- https://github.com/tox-dev/filelock/pull/839
- https://github.com/tox-dev/filelock/commit/8cf51802158b9cf7e1fc560c2da30491a662cfde
- https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03
- https://github.com/tox-dev/filelock/releases/tag/4.2.1
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.