CVE-2026-114134
Published:October 22, 2026
Updated:October 23, 2026
The GitHub Action bundled with Black can read the version from "tool.black.required-version" if "use_pyproject" is set to True. This version is not validated and therefore can be used to execute untrusted code in the context of a victim's repository.
Affected Packages
black (CONDA):
Affected version(s) =26.10.0 <26.10.1Fix Suggestion:
Update to version 26.10.1https://github.com/psf/black.git (GITHUB):
Affected version(s) =26.10.0 <26.10.1Fix Suggestion:
Update to version 26.10.1black (PYTHON):
Affected version(s) =26.10.0 <26.10.1Fix Suggestion:
Update to version 26.10.1Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
8.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Inclusion of Functionality from Untrusted Control Sphere