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.
History

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 21 Oct 2026 21:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:tox-dev:filelock:*:*:*:*:*:python:*:*

Wed, 21 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-59
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 20 Oct 2026 17:45:00 +0000

Type Values Removed Values Added
First Time appeared Tox-dev
Tox-dev filelock
Vendors & Products Tox-dev
Tox-dev filelock

Tue, 20 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
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.
Title filelock: SoftReadWriteLock holder refresh writes through a hard link and hangs on a named pipe that another local user renames over its record
Weaknesses CWE-62
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-20T14:30:43.736Z

Updated: 2026-10-22T21:28:27.242Z

Reserved: 2026-10-19T21:30:47.244Z

Link: CVE-2026-112934

cve-icon Vulnrichment

Updated: 2026-10-22T21:28:21.410Z

cve-icon NVD

Status : Modified

Published: 2026-10-20T15:17:16.100

Modified: 2026-10-22T22:18:02.680

Link: CVE-2026-112934

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T14:30:43Z

Links: CVE-2026-112934 - Bugzilla