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CVE-2026-112936 Details

Description

filelock is a platform-independent file lock for Python. From 3.20.4 until 4.0.9, ReadWriteLock and AsyncReadWriteLock versions from 3.20.4 resolve the lock path and pass it to SQLite without rejecting a final symbolic link, allowing another local user who can create names in the lock directory to redirect database creation and locking or split mutual exclusion between targets. This issue is fixed in version 4.0.9.

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:H/A:L

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/tox-dev/filelock/security/advisories/GHSA-j8f7-rjxc-mr56	CISA-ADP	ExploitVendor Advisory
https://github.com/tox-dev/filelock/commit/4d45e83caf7e31f9a12fb44526bdc07f70114f04	[email protected]	Patch
https://github.com/tox-dev/filelock/releases/tag/4.0.9	[email protected]	Release Notes
https://github.com/tox-dev/filelock/security/advisories/GHSA-j8f7-rjxc-mr56	[email protected]	ExploitVendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-59	Improper Link Resolution Before File Access ('Link Following')	[email protected]
CWE-668	Exposure of Resource to Wrong Sphere	[email protected]

Affected Products

Product	Versions
tox-dev filelock	>= 3.20.4, < 4.0.9
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 21, 2026	Initial Analysis	[email protected]
Oct 20, 2026	CVE Modified	CISA-ADP
Oct 20, 2026	New CVE Received	[email protected]