Link Following Affecting python-filelock package, versions <4.0.12-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.23% (14th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-PYTHONFILELOCK-21281821
  • published21 Oct 2026
  • disclosed20 Oct 2026

Introduced: 20 Oct 2026

NewCVE-2026-112936  (opens in a new tab)
CWE-59  (opens in a new tab)
CWE-668  (opens in a new tab)

How to fix?

Upgrade Debian:unstable python-filelock to version 4.0.12-1 or higher.

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 3.20.4 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.

CVSS Base Scores

version 3.1