CVE-2026-46420
setup-php is a GitHub action to set up PHP with extensions, php.ini configuration, coverage drivers, and tools.
Impact
setup-php is a GitHub action to set up PHP with extensions, php.ini configuration, coverage drivers, and tools. From 2.25.0 prior to 2.37.1, shivammathur/setup-php resolves the PHP version from repository-controlled files such as .php-version, composer.lock through platform-overrides.php, and composer.json through config.platform.php, and insufficiently constrains those values before incorporating them into generated shell or PowerShell setup scripts, allowing command injection on a GitHub Actions runner when workflows such as pull_request_target check out attacker-controlled contents before invoking setup-php. This issue is fixed in version 2.37.1.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| actions | shivammathur/setup-php | >= 2.25.0, < 2.37.1 | 2.37.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Shivammathur | Setup Php | from 2.25.0 before 2.37.1 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-pqwm-q9pv-ph8r
- https://github.com/shivammathur/setup-php/security/advisories/GHSA-pqwm-q9pv-ph8r
- https://github.com/shivammathur/setup-php/commit/eeef37e059fb5368a5bc8ed8ce45ff54bd39b80b
- https://github.com/shivammathur/setup-php/releases/tag/2.37.1