CVE-2026-112912
Published:October 20, 2026
Updated:October 21, 2026
filelock is a platform-independent file lock for Python. From 3.32.6 until 4.2.1, SoftFileLock can follow a swapped symbolic link during the conditional os.access writability check for a node without its owner-write bit, allowing another local user on a platform and directory configuration that follows the link to infer whether a chosen path exists and is writable from the observable acquisition result. 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)
Do you need more information?
Contact UsCVSS v4
Base Score:
2
Attack Vector
LOCAL
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
2.5
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Improper Link Resolution Before File Access ('Link Following')