What is CVE-2026-112940?

CVE-2026-112940 is a high-severity vulnerability in Tox-Dev Filelock, classified under Race Condition Enabling Link Following. CVSS score: 7.1/10. Published 2026-10-20.

How severe is CVE-2026-112940?

High severity. CVSS v3 base score is 7.1 out of 10.

Vulnerability in Tox-Dev Filelock

CVE-2026-112940

filelock is a platform-independent file lock for Python. From 3.20.4 until 4.2.1, ReadWriteLock let SQLite reopen the database and side files by name; on POSIX systems an attacker with rename access in a non-sticky parent can swap those names to cause overwrite or unlink operations, while a writable adjacent hot journal is additionally required for attacker-chosen content overwrites. This issue is fixed in version 4.2.1.

Published 2026-10-20.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Tox-Dev Filelock — versions >= 3.20.4, < 4.2.1

Weakness classification (CWE)

CWE-363 — Race Condition Enabling Link Following

References

Frequently asked questions

What is CVE-2026-112940?: CVE-2026-112940 is a high-severity vulnerability in Tox-Dev Filelock, classified under Race Condition Enabling Link Following. CVSS score: 7.1/10. Published 2026-10-20.
How severe is CVE-2026-112940?: High severity. CVSS v3 base score is 7.1 out of 10.