High severity · published May 11, 2026
CVE-2026-42603
OWASP BLT: pre-commit-fix.yaml executes untrusted fork code via pull_request_target
8.8
CVSS
0.2%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 16% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BL
BLT · OWASP-BLT
< 2.1.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-42603
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-42603
github.com
https://github.com/OWASP-BLT/BLT/security/advisories/GHSA-cgvj-qg2h-cqfh
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