CVE-2026-112935

4.7 MEDIUMpublic exploit available

Published 2026-10-20 · Updated 2026-10-21

AI analysis for this CVE has not been generated yet. Raw NVD data is shown below.

NVD description

filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

Weaknesses

CWE-367

Vendors

tox-dev

Products

filelock

Public exploit & PoC references

https://github.com/tox-dev/filelock/commit/740ff666b62a88496c8d7394e4e6230605e4d62b[Patch]
https://github.com/tox-dev/filelock/pull/843[Patch]
https://github.com/tox-dev/filelock/releases/tag/4.2.1[Release Notes]
https://github.com/tox-dev/filelock/security/advisories/GHSA-fq56-3cx3-fjxp[Exploit, Mitigation, Patch, Vendor Advisory]

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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