CVE-2026-112940
Published:October 20, 2026
Updated:October 21, 2026
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.
Affected Packages
filelock (CONDA):
Affected version(s) >=4.0.1 <4.2.1Fix Suggestion:
Update to version 4.2.1https://github.com/tox-dev/filelock.git (GITHUB):
Affected version(s) >=4.0.0 <4.2.1Fix Suggestion:
Update to version 4.2.1filelock (PYTHON):
Affected version(s) >=4.0.0 <4.2.1Fix Suggestion:
Update to version 4.2.1Related Resources (4)
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Contact UsCVSS v4
Base Score:
6.9
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.1
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Race Condition Enabling Link Following