Description

Black is the uncompromising Python code formatter. Black provides a GitHub action for formatting code. This action supports an option, use_pyproject: true, for reading the version of Black to use from the repository pyproject.toml. A malicious pull request could edit pyproject.toml to use a direct URL reference to a malicious repository. This could lead to arbitrary code execution in the context of the GitHub Action. Attackers could then gain access to secrets or permissions available in the context of the action. Version 26.3.0 fixes this vulnerability.

INFO

Published Date :

2026-03-11T19:15:20.822Z

Last Modified :

2026-03-13T03:55:48.806Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-31900 vulnerability.

Vendors Products
Psf
  • Black
Python
  • Black
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-31900.

URL Resource
https://github.com/psf/black/commit/0a2560b981364dde4c8cf8ce9d164c40669a8611 cve-icon cve-icon
https://github.com/psf/black/security/advisories/GHSA-v53h-f6m7-xcgm cve-icon cve-icon
Login to claim this CVE

CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact