medium6.1
CVE-2026-112936
filelock: ReadWriteLock follows a symlink at the lock path into SQLite
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | filelock | >= 3.20.4, <= 4.0.8 | 4.0.9 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Tox-Dev | Filelock | from 3.20.4 before 4.0.9 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-j8f7-rjxc-mr56
- https://github.com/tox-dev/filelock/security/advisories/GHSA-j8f7-rjxc-mr56
- https://nvd.nist.gov/vuln/detail/CVE-2026-112936
- https://github.com/tox-dev/filelock/commit/4d45e83caf7e31f9a12fb44526bdc07f70114f04
- https://github.com/tox-dev/filelock/releases/tag/4.0.9