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CVE-2026-112914

5.3 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, SoftFileLock can restore a stale marker by name after moving it aside, allowing another local user with rename access in a non-sticky lock directory to swap in a symbolic link and, on a runtime that follows the link and a same-filesystem target, make the lock user hard-link one of its files into the lock directory. 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 9

  1. CwesCWE-363 → CWE-363, CWE-59NVD modified 2026-10-21 21:17
  2. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-21 21:17
  3. StatusPublished → AnalyzedNVD modified 2026-10-21 21:17
  4. StatusUndergoing Analysis → PublishedNVD modified 2026-10-21 15:55
  5. StatusPublished → Undergoing AnalysisNVD modified 2026-10-21 16:17
  6. StatusUndergoing Analysis → PublishedNVD modified 2026-10-20 14:26
  7. StatusPublished → Undergoing AnalysisNVD modified 2026-10-20 19:50
  8. StatusReceived → PublishedNVD modified 2026-10-20 14:26
  9. First seenCVSS 5.3NVD modified 2026-10-20 15:17

Affected (CPE criteria) 1

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

References 4