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CVE-2026-112940

7.1 · HIGH

filelock is a platform-independent file lock for Python.

Published Oct 20, 2026tox-devCWE-363EPSS 0.19%

Overview

CVE-2026-112940 is a high-severity vulnerability affecting tox-dev filelock. It was published on October 20, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from tox-dev. Update filelock to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
tox-devfilelock>= 3.20.4, < 4.2.1Affected

References

GitHubgithub.com/tox-dev/filelock/commit/5e3f2ec0c5fb17cb2635b60b2b68bc63ab81ca2dGitHubgithub.com/tox-dev/filelock/pull/834GitHubgithub.com/tox-dev/filelock/releases/tag/4.2.1GitHubgithub.com/tox-dev/filelock/security/advisories/GHSA-v4x8-3wr5-3wq8GitHubgithub.com/tox-dev/filelock/security/advisories/GHSA-v4x8-3wr5-3wq8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-112940?

CVE-2026-112940 is a high-severity vulnerability affecting tox-dev filelock. It was published on October 20, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-112940?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-112940?

Check the references section for vendor advisories and patches from tox-dev. Update filelock to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-112940?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-112940 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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