CVE-2026-112915CWE-400denial-of-service

CVE-2026-112915

Medium · published October 20, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
11.6
In the wild
Unconfirmed
What it is

filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock can open a crafted SQLite lock database without bounding schema and query work, allowing another local user who can replace the database to make acquisition stall or hang; versions from 3.20.4 expose this on initial per-instance opening, and versions from 3.30.0 repeat the exposure on every acquisition. This issue is fixed in version 4.2.1.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00218 · 11.6th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2026-10-20T19:17Z
Affected products (1)
ProductVersionsFixed in
tox-dev/filelock≥ 3.20.4, < 4.2.14.2.1
References (5)
https://github.com/tox-dev/filelock/commit/5e3f2ec0c5fb17cb2635b60b2b68bc63ab81ca2d · [email protected]https://github.com/tox-dev/filelock/pull/834 · [email protected]https://github.com/tox-dev/filelock/releases/tag/4.2.1 · [email protected]https://github.com/tox-dev/filelock/security/advisories/GHSA-cwqr-hh33-gh44 · [email protected]https://github.com/tox-dev/filelock/security/advisories/GHSA-cwqr-hh33-gh44 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 22 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 20 OCT 14:28Z
    filelock ReadWriteLock: a crafted lock database makes every acquire stall or hang regardless of timeout
    cvelistv5
  • 20 OCT 14:28Z
    filelock ReadWriteLock: a crafted lock database makes every acquire stall or hang regardless of timeout
    cvelistv5