CVE-2026-114134
HIGH
MEDIUM
Priority: 0.04
BB Relevance:
67/100
Published: 2026-11-05
Modified: 2026-11-12
First seen: 2026-11-05
Status: active
Attack Surface
Network
Low Complexity
No Interaction
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
Low
UI:
None
S:
X
AT:
None
VC:
High
VI:
High
VA:
High
Description
Black is the uncompromising Python code formatter. Prior to 26.10.1, the Black GitHub Action with use_pyproject: true accepts tool.black.required-version from pyproject.toml without validating that it is a released Black version specifier. An attacker who can submit a pull request can change that field to a direct reference to attacker-controlled code, causing the workflow to install and execute the code in the victim repository's GitHub Actions context. This issue is fixed in version 26.10.1.
Weakness Classification (1)
References & Advisories (3)
x_refsource_MISC
x_refsource_MISC
x_refsource_CONFIRM