CVE-2026-112914
filelock: SoftFileLock stale-break restore follows a swapped-in symbolic link and hard-links a file of the user running the lock into the lock directory
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 20, 2026
- Updated
- Oct 21, 2026
- Reserved
- Oct 19, 2026
Description
filelock is a platform-independent file lock for Python. From 4.1.0 until 4.2.1, SoftFileLock can restore a stale marker by name after moving it aside, allowing another local user with rename access in a non-sticky lock directory to swap in a symbolic link and, on a runtime that follows the link and a same-filesystem target, make the lock user hard-link one of its files into the lock directory. This issue is fixed in version 4.2.1.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.3 Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N | GitHub_M |
Weaknesses
- CWE-363 Race Condition Enabling Link Following
Affected Products
| Product | Versions |
|---|---|
filelocktox-dev |
|
References
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