CVE-2026-112911

MediumCVSS 6.3/10Last modified Oct 28, 2026

Description

filelock is a platform-independent file lock for Python. From 3.30.0 until 4.2.1, StrictSoftFileLock versions from 3.30.0 and SoftReadWriteLock versions from 4.0.0 can adopt a protocol directory created first by another local user in a shared parent directory, allowing that user to alter protocol state and admit concurrent holders. This issue is fixed in version 4.2.1.

Metrics

CVSS 3.1 6.3/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:H

Weakness enumeration

CWE-283

Affected software

Vendor	Product	Versions
tox-dev	filelock	>= 3.30.0, < 4.2.1

References

https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03Patch
https://github.com/tox-dev/filelock/pull/839Patch
https://github.com/tox-dev/filelock/releases/tag/4.2.1Release Notes
https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4Exploit, Mitigation, Patch, Vendor Advisory
https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4Exploit, Mitigation, Patch, Vendor Advisory

Timeline

Published: Oct 20, 2026
Last modified: Oct 28, 2026
NVD status: Modified

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