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vuln-cve/data/2026/46xxx/CVE-2026-46420.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-46420",
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"state": "PUBLISHED",
"assignerShortName": "GitHub_M",
"dateReserved": "2026-05-13T22:18:22.829Z",
"datePublished": "2026-07-17T19:51:10.253Z",
"dateUpdated": "2026-07-20T18:15:56.324Z"
},
"containers": {
"cna": {
"title": "setup-php: Command Injection in Repository-Derived PHP Version Resolution",
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-78",
"lang": "en",
"description": "CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')",
"type": "CWE"
}
]
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 5.6,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L",
"version": "3.1"
}
}
],
"references": [
{
"name": "https://github.com/shivammathur/setup-php/security/advisories/GHSA-pqwm-q9pv-ph8r",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/shivammathur/setup-php/security/advisories/GHSA-pqwm-q9pv-ph8r"
},
{
"name": "https://github.com/shivammathur/setup-php/commit/eeef37e059fb5368a5bc8ed8ce45ff54bd39b80b",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/shivammathur/setup-php/commit/eeef37e059fb5368a5bc8ed8ce45ff54bd39b80b"
},
{
"name": "https://github.com/shivammathur/setup-php/releases/tag/2.37.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/shivammathur/setup-php/releases/tag/2.37.1"
}
],
"affected": [
{
"vendor": "shivammathur",
"product": "setup-php",
"versions": [
{
"version": ">= 2.25.0, < 2.37.1",
"status": "affected"
}
]
}
],
"providerMetadata": {
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M",
"dateUpdated": "2026-07-17T19:51:10.253Z"
},
"descriptions": [
{
"lang": "en",
"value": "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": {
"advisory": "GHSA-pqwm-q9pv-ph8r",
"discovery": "UNKNOWN"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"timestamp": "2026-07-20T18:09:22.675511Z",
"id": "CVE-2026-46420",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"version": "2.0.3"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-07-20T18:15:56.324Z"
}
}
]
}
}