CVE-2026-112935

Published Oct 20, 2026

Last updated 17 hours ago

Overview

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.
Source
security-advisories@github.com
NVD status
Analyzed
Products
filelock

Risk scores

CVSS 3.1

Type
Secondary
Base score
4.7
Impact score
3.6
Exploitability score
1
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Severity
MEDIUM

Weaknesses

security-advisories@github.com
CWE-367

Social media

Hype score
Not currently trending

Configurations