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CVE-2026-112934 Details

Description

filelock is a platform-independent file lock for Python. From 4.0.0 until 4.2.1, SoftReadWriteLock refreshes holder records by name, allowing another local user with rename access to the lock directory to replace a record with a named pipe and stall the lock, or under a permissive hard-link policy to link a reachable target file and cause the lock user to write through it. This issue is fixed in version 4.2.1.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/tox-dev/filelock/security/advisories/GHSA-fj95-fr6c-h845	CISA-ADP	ExploitMitigationVendor Advisory
https://github.com/tox-dev/filelock/commit/bfa066d65a1ba9106f86ee9d027f7588b9c77e03	[email protected]	Patch
https://github.com/tox-dev/filelock/pull/842	[email protected]	Patch
https://github.com/tox-dev/filelock/releases/tag/4.2.1	[email protected]	Release Notes
https://github.com/tox-dev/filelock/security/advisories/GHSA-fj95-fr6c-h845	[email protected]	ExploitMitigationVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-62	UNIX Hard Link	[email protected]

Affected Products

Product	Versions
tox-dev filelock	>= 4.0.0, < 4.2.1
CPE cpe:2.3:a:tox-dev:filelock::::::python::* Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Oct 22, 2026	CVE Modified	CISA-ADP
Oct 21, 2026	Initial Analysis	[email protected]
Oct 20, 2026	New CVE Received	[email protected]