CVE-2026-46420— setup-php: Command Injection in Repository-Derived PHP Version Resolution
In-the-Wild Activity Observed github_trending · low
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| shivammathur | setup-php | >= 2.25.0, < 2.37.1 | affected |
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I. Basic Information for CVE-2026-46420
Vulnerability Information
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Vulnerability Title
setup-php: Command Injection in Repository-Derived PHP Version Resolution
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Shivam Mathur Setup PHP 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Shivam Mathur Setup PHP是Shivam Mathur个人开发者的一款用于配置PHP环境的软件。 Shivam Mathur Setup PHP 2.25.0版本至2.37.1之前版本存在命令注入漏洞，该漏洞源于从仓库控制文件中提取PHP版本时未充分限制值的使用，导致在生成shell或PowerShell脚本时可能发生命令注入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| shivammathur | setup-php | >= 2.25.0, < 2.37.1 | - |
II. Public POCs for CVE-2026-46420
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-46420 (1)
Vendor Advisories for CVE-2026-46420 (1)
Vendor Pages for CVE-2026-46420 (1)
IV. Related Vulnerabilities
Same weakness: CWE-78
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IBM Db2 Mirror for i is affected by multiple vulnerabilities - CVE-2026-19188
Haiwell IoT Cloud HMI Gateway OS Command Injection - CVE-2026-19682
Command Injection
V. Comments for CVE-2026-46420
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