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CVE-2026-112937

6.1 medium SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 3

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 8

  1. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-21 18:05
  2. StatusPublished → AnalyzedNVD modified 2026-10-21 18:05
  3. StatusUndergoing Analysis → PublishedNVD modified 2026-10-21 15:55
  4. StatusPublished → Undergoing AnalysisNVD modified 2026-10-21 16:17
  5. StatusUndergoing Analysis → PublishedNVD modified 2026-10-20 14:36
  6. StatusPublished → Undergoing AnalysisNVD modified 2026-10-20 19:50
  7. StatusReceived → PublishedNVD modified 2026-10-20 14:36
  8. First seenCVSS 6.1NVD modified 2026-10-20 15:17

Affected (CPE criteria) 1

  • cpe:2.3:a:tox-dev:filelock:*:*:*:*:*:python:*:*

References 4