Medium 5.6Published Jul 17, 2026

CVE-2026-46420setup-php: Command Injection in Repository-Derived PHP Version Resolution

Updated under an hour ago (Oct 27, 2026, 12:40 AM ET)

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It affects shivammathur setup-php. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for shivammathur setup-php

Exploited in the last 30 days

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.

CVSS: 5.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

shivammathur setup-php shivammathur:setup_php (from the name)	from 2.25.0, < 2.37.1	CNA record
shivammathur setup_php shivammathur:setup_php	from 2.25.0 before 2.37.1	NVD

References

References

https://github.com/shivammathur/setup-php/security/advisories/GHSA-pqwm-q9pv-ph8r	x-refsource-confirm, patch, vendor-advisory
https://github.com/shivammathur/setup-php/commit/eeef37e059fb5368a5bc8ed8ce45ff54bd39b80b	x-refsource-misc, patch
https://github.com/shivammathur/setup-php/releases/tag/2.37.1	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.