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CVE-2026-112935

nvd nist
Published: Oct 20, 2026Modified: Oct 21, 2026

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4.7
Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Exploitability: 1.0 / Impact: 3.6
Source: security-advisories@github.com (Secondary)

Description

filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can break a stale marker after an attacker frees its own marker following the stale read, an honest contender creates a live successor on the reused inode, and the successor's modification time is not newer than the saved observation, causing the live marker to be removed and two holders to be admitted. This issue is fixed in version 4.2.1.

Affected (1)

Products: Tox Dev: Filelock
Tox Dev
1 product
Filelock
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Filelock
3.22.0 ≤ version < 4.2.1

Related CWEs

CWE-367
Time-of-check Time-of-use (TOCTOU) Race Condition
The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.

References (4)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Release Notes
Source: security-advisories@github.com
ExploitMitigationPatchVendor Advisory

Timeline

No history available yet.