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CVE PROGRAM SOURCE RECORD6.1 Medium

CVE-2026-112937

filelock: ReadWriteLock on the hard-link route deletes any directory another user renames onto its .filelock-* link directory name

Description

filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, ReadWriteLock can remove a randomized .filelock-* private-hard-link directory during cleanup, allowing another local user with rename access in a non-sticky parent to observe a live name or forge a dead-owner sweep name and rename a sibling directory onto it for deletion. This issue is fixed in version 4.2.1.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

tox-dev filelock

  • >= 4.1.0, < 4.2.1affected

References