Vulnerability Description
filelock is a platform-independent file lock for Python. From 3.32.6 until 4.2.1, SoftFileLock can follow a swapped symbolic link during the conditional os.access writability check for a node without its owner-write bit, allowing another local user on a platform and directory configuration that follows the link to infer whether a chosen path exists and is writable from the observable acquisition result. This issue is fixed in version 4.2.1.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tox-Dev | Filelock | >= 3.32.6, < 4.2.1 |
Related Weaknesses (CWE)
References
- https://github.com/tox-dev/filelock/commit/e1e825b1992f69fb6b346dc395d5ae4893536Patch
- https://github.com/tox-dev/filelock/pull/835Patch
- https://github.com/tox-dev/filelock/releases/tag/4.2.1Release Notes
- https://github.com/tox-dev/filelock/security/advisories/GHSA-9j6q-wvj5-jgjgExploitMitigationPatch
- https://github.com/tox-dev/filelock/security/advisories/GHSA-9j6q-wvj5-jgjgExploitMitigationPatch
FAQ
What is CVE-2026-112912?
CVE-2026-112912 is a vulnerability with a CVSS score of 2.5 (LOW). filelock is a platform-independent file lock for Python. From 3.32.6 until 4.2.1, SoftFileLock can follow a swapped symbolic link during the conditional os.access writability check for a node without ...
How severe is CVE-2026-112912?
CVE-2026-112912 has been rated LOW with a CVSS base score of 2.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-112912?
Check the references section above for vendor advisories and patch information. Affected products include: Tox-Dev Filelock.