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CVE-2026-112912

2.5 low SSVC exploitation: poc Analyzed
NVD · CVE.org

filelock is a platform-independent file lock for Python. From 3.32.6 until 4.2.1, SoftFileLock can follow a swapped symbolic link during the conditional os.access writability check for a node without its owner-write bit, allowing another local user on a platform and directory configuration that follows the link to infer whether a chosen path exists and is writable from the observable acquisition result. 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 8

  1. Cpes+1 CPE criteria (now 1)NVD modified 2026-10-21 21:18
  2. StatusPublished → AnalyzedNVD modified 2026-10-21 21:18
  3. StatusUndergoing Analysis → PublishedNVD modified 2026-10-20 15:37
  4. StatusPublished → Undergoing AnalysisNVD modified 2026-10-20 19:48
  5. StatusReceived → PublishedNVD modified 2026-10-20 15:37
  6. StatusPublished → ReceivedNVD modified 2026-10-20 16:17
  7. StatusReceived → PublishedNVD modified 2026-10-20 14:23
  8. First seenCVSS 2.5NVD modified 2026-10-20 15:17

Affected (CPE criteria) 1

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

References 5