CVE-2026-112940
filelock ReadWriteLock: SQLite reopens the lock database by name, so a planted symlink or journal file makes the lock user's process overwrite or unlink its own files
- State
- Published
- Severity
- 7.1 High
- Published
- Oct 20, 2026
- Updated
- Oct 22, 2026
- Reserved
- Oct 19, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H | GitHub_M |
Weaknesses
- CWE-363 Race Condition Enabling Link Following
Affected Products
| Product | Versions |
|---|---|
filelocktox-dev |
|
References
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