CVE-2026-42603 PUBLISHED

OWASP BLT: pre-commit-fix.yaml executes untrusted fork code via pull_request_target

Assigner: GitHub_M
Reserved: 29.04.2026 Published: 11.05.2026 Updated: 11.05.2026

OWASP BLT is a QA testing and vulnerability disclosure platform that encompasses websites, apps, git repositories, and more. Prior to 2.1.2, .github/workflows/pre-commit-fix.yaml uses pull_request_target (privileged trigger) but checks out and executes code directly from the attacker's fork, enabling RCE with write permissions. This vulnerability is fixed in 2.1.2.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS Score: 8.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	Required	Availability Impact	High

CVSS 3.1

Product Status

Vendor	OWASP-BLT
Product	BLT
Versions	Version < 2.1.2 is affected

References

https://github.com/OWASP-BLT/BLT/security/advisories/GHSA-cgvj-qg2h-cqfh

Problem Types

CWE-94: Improper Control of Generation of Code ('Code Injection') CWE
CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection') CWE