CVE-2026-112911: tox-dev filelock

CVSS 6.3 (medium) · published 2026-10-20

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.

Affected products (NVD): tox-dev filelock

Fixed in (NVD): 4.2.1

Weakness: CWE-283

Source: NVD CVE-2026-112911

References

• https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03
• https://github.com/tox-dev/filelock/pull/839
• https://github.com/tox-dev/filelock/releases/tag/4.2.1
• https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4
• https://github.com/tox-dev/filelock/security/advisories/GHSA-9c4x-gm8v-wgc4

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