CVE-2026-112909
Published:October 20, 2026
Updated:October 21, 2026
filelock is a platform-independent file lock for Python. Prior to 4.2.1, UnixFileLock can truncate a regular file renamed onto the lock path when another local user has actual rename permission, or hard-linked there under a permissive hard-link policy; when an explicit mode is requested, affected versions from 3.10.2 can also change that file's mode. 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
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.1
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Use of Incorrectly-Resolved Name or Reference