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CVE-2026-112941

3.3 low SSVC exploitation: poc Modified
NVD · CVE.org

filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftReadWriteLock and AsyncSoftReadWriteLock cache a successful check of the <path>.rw lock tree and resolve its names again during later record operations, allowing another local user who can replace that tree after the first acquisition to redirect lock-record writes into directories writable by the lock user. This issue is fixed in version 4.2.1.

Fix

Patch, vendor advisory and mitigation references on NVD 4

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

Change history 7

  1. StatusAnalyzed → ModifiedNVD modified 2026-10-28 15:17
  2. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-21 17:52
  3. StatusPublished → AnalyzedNVD modified 2026-10-21 17:52
  4. StatusUndergoing Analysis → PublishedNVD modified 2026-10-20 14:43
  5. StatusPublished → Undergoing AnalysisNVD modified 2026-10-20 19:50
  6. StatusReceived → PublishedNVD modified 2026-10-20 14:43
  7. First seenCVSS 3.3NVD modified 2026-10-20 15:17

Affected (CPE criteria) 1

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

References 5