OWASP-BLT up to 2.1 regenerate-migrations.yml pull_request_target code injection

Summaryinfo

A vulnerability classified as critical has been found in OWASP-BLT BLT up to 2.1. The affected element is the function pull_request_target of the file github/workflows/regenerate-migrations.yml. Performing a manipulation results in code injection. This vulnerability is known as CVE-2026-40316. Remote exploitation of the attack is possible. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in OWASP-BLT BLT up to 2.1. This affects the function pull_request_target of the file github/workflows/regenerate-migrations.yml. The manipulation with an unknown input leads to a code injection vulnerability. CWE is classifying the issue as CWE-94. The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

OWASP BLT is a QA testing and vulnerability disclosure platform that encompasses websites, apps, git repositories, and more. Versions prior to 2.1.1 contain an RCE vulnerability in the .github/workflows/regenerate-migrations.yml workflow. The workflow uses the pull_request_target trigger to run with full GITHUB_TOKEN write permissions, copies attacker-controlled files from untrusted pull requests into the trusted runner workspace via git show, and then executes python manage.py makemigrations, which imports Django model modules including attacker-controlled website/models.py at runtime. Any module-level Python code in the attacker's models.py is executed during import, enabling arbitrary code execution in the privileged CI environment with access to GITHUB_TOKEN and repository secrets. The attack is triggerable by any external contributor who can open a pull request, provided a maintainer applies the regenerate-migrations label, potentially leading to secret exfiltration, repository compromise, and supply chain attacks. A patch for this issue is expected to be released in version 2.1.1.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-40316 since 04/10/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059 for this issue.

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• OWASP-BLT

Name

• BLT

Version

• 2.0
• 2.1

Website

• Product: https://github.com/OWASP-BLT/BLT/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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