CVE-2026-46420

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Source
https://cve.org/CVERecord?id=CVE-2026-46420
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46420.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-46420
Aliases
Published
2026-07-17T19:51:10Z
Modified
2026-10-28T02:30:49Z
Severity
  • 5.6 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
setup-php: Command Injection in Repository-Derived PHP Version Resolution
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-78"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46420.json"
}
References

Affected packages

Git / github.com/shivammathur/setup-php

Affected ranges

Type
GIT
Repo
https://github.com/shivammathur/setup-php
Events
Introduced
1fdc5e773bb54b5aa541c73679d6e9acc692d0cd
Fixed
7c071dfe9dc99bdf297fa79cb49ea005b9fcadbc
Fixed
eeef37e059fb5368a5bc8ed8ce45ff54bd39b80b
Database specific
Show details 
{
    "extracted_events": [
        {
            "cpe": "cpe:2.3:a:shivammathur:setup_php:*:*:*:*:*:*:*:*",
            "range": [
                {
                    "introduced": "2.25.0"
                },
                {
                    "fixed": "2.37.1"
                }
            ],
            "source": "CPE_RANGE"
        },
        {
            "range": [
                {
                    "fixed": "eeef37e059fb5368a5bc8ed8ce45ff54bd39b80b"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "2.37.1",
            "range": [
                {
                    "fixed": "7c071dfe9dc99bdf297fa79cb49ea005b9fcadbc"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

2.*
2.25.0
2.25.1
2.25.2
2.25.3
2.25.4
2.25.5
2.26.0
2.27.0
2.27.1
2.28.0
2.29.0
2.30.0
2.30.1
2.30.2
2.30.3
2.30.4
2.30.5
2.31.0
2.31.1
2.32.0
2.33.0
2.34.0
2.34.1
2.35.0
2.35.1
2.35.2
2.35.3
2.35.4
2.35.5
2.36.0
2.37.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46420.json"