filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock can open a crafted SQLite lock database without bounding schema and query work, allowing another local user who can replace the database to make acquisition stall or hang; versions from 3.20.4 expose this on initial per-instance opening, and versions from 3.30.0 repeat the exposure on every acquisition. This issue is fixed in version 4.2.1.
History

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 12:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 20 Oct 2026 16:45:00 +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 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


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

Type Values Removed Values Added
Description filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock can open a crafted SQLite lock database without bounding schema and query work, allowing another local user who can replace the database to make acquisition stall or hang; versions from 3.20.4 expose this on initial per-instance opening, and versions from 3.30.0 repeat the exposure on every acquisition. This issue is fixed in version 4.2.1.
Title filelock ReadWriteLock: a crafted lock database makes every acquire stall or hang regardless of timeout
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-20T14:28:41.520Z

Updated: 2026-10-20T15:25:38.592Z

Reserved: 2026-10-19T20:16:09.858Z

Link: CVE-2026-112915

cve-icon Vulnrichment

Updated: 2026-10-20T15:25:33.982Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-20T15:17:15.953

Modified: 2026-10-21T21:15:34.300

Link: CVE-2026-112915

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-20T14:28:41Z

Links: CVE-2026-112915 - Bugzilla