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VULNERABILITIES

CVE-2026-112906 Details

Description

filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftFileLock versions from 4.1.0 can reuse a stale observation when an attacker pre-dates and removes its own marker, at least two lock-user processes are waiting, coarse or matching modification times preserve the observation, and an honest contender creates a fresh marker on the reused inode, causing that live marker to be removed as stale. This issue is fixed in version 4.2.1.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.7 MEDIUMVector:CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/tox-dev/filelock/security/advisories/GHSA-2g95-wg33-c5x2 CISA-ADPExploitMitigationPatchVendor Advisory
https://github.com/tox-dev/filelock/commit/740ff666b62a88496c8d7394e4e6230605e4d62b [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-2g95-wg33-c5x2 [email protected]ExploitMitigationPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')[email protected]
CWE-694Use of Multiple Resources with Duplicate Identifier[email protected]

Affected Products

ProductVersions
tox-dev filelock
>= 4.1.0, < 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

QUICK INFO

CVE Dictionary Entry:
CVE-2026-112906
NVD Published Date:
Oct 20, 2026
NVD Last Modified:
Oct 27, 2026
Source:
[email protected]
CVE-2026-112906 Details - Not Deferred