Insufficient Verification of Data Authenticity Affecting python-filelock package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.14% (4th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PYTHONFILELOCK-21281809
  • published21 Oct 2026
  • disclosed20 Oct 2026

Introduced: 20 Oct 2026

NewCVE-2026-112939  (opens in a new tab)
CWE-345  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable python-filelock.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-filelock package and not the python-filelock package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

filelock is a platform-independent file lock for Python. From 3.22.0 until 4.2.1, SoftFileLock can trust a forged process identifier in a marker that an attacker can modify but cannot remove, allowing an authorized contender such as another process of the holder's account or root to act as a confused deputy, remove the live marker, and admit another holder. This issue is fixed in version 4.2.1.

CVSS Base Scores

version 3.1