{"id":"GHSA-r6hr-vr92-vv28","summary":"PHPCSUtils: Remote code execution via eval() in AbstractArrayDeclarationSniff::getActualArrayKey()","details":"### Impact\n\nPHPCSUtils versions 1.0.0-alpha1 through 1.2.2 contain an arbitrary code execution vulnerability in `PHPCSUtils\\AbstractSniffs\\AbstractArrayDeclarationSniff::getActualArrayKey()`. The vulnerable method is reached by any sniff that extends `AbstractArrayDeclarationSniff` and calls `getActualArrayKey()`.\n\nRunning PHPCS over untrusted PHP code through such a sniff, for example, in a CI pipeline that lints pull requests, or on a developer machine reviewing third-party code, could lead to arbitrary command execution on the scanning host.\n\nThe vulnerability happens when the method determines the value of an array key using `eval()`. A maliciously crafted array key such as `'system'('id')` would be executed when the code was scanned.\n\n### Known attack vectors\n\nKnown code paths that reach the vulnerable method include the following PHPCSExtra sniffs:\n\n- `Universal.Arrays.DuplicateArrayKey`\n- `Universal.Arrays.MixedArrayKeyTypes`\n\nOther packages that call `AbstractArrayDeclarationSniff::getActualArrayKey()` may also be vulnerable.\n\n### Patches\n\nThis issue has been fixed in PHPCSUtils 1.2.3. We recommend all users upgrade to 1.2.3 or later.\n\n### Workaround\n\nUsers who cannot upgrade immediately can disable the sniffs that reach the vulnerable method by adding `\u003cexclude\u003e` tags to their custom ruleset (replace the placeholder standard and sniff names with the ones used in your setup):\n\n```xml\n\u003crule ref=\"Standard\"\u003e\n\t\u003cexclude name=\"Standard.Category.SniffName\"/\u003e\n\u003c/rule\u003e\n```\n\nFor example, to disable the two PHPCSExtra sniffs listed under \"Known attack vectors\":\n\n```xml\n\u003crule ref=\"Universal\"\u003e\n\t\u003cexclude name=\"Universal.Arrays.DuplicateArrayKey\"/\u003e\n\t\u003cexclude name=\"Universal.Arrays.MixedArrayKeyTypes\"/\u003e\n\u003c/rule\u003e\n```\n\nTo verify that the sniffs have been disabled, run PHPCS with the `-e` flag, which lists all the sniffs a standard will run. The excluded sniffs should no longer appear in the output:\n\n```\nphpcs -e --standard=/path/to/ruleset.xml\n```\n\n### Credits\n\nMany thanks to [@rodrigoprimo](https://github.com/rodrigoprimo) for responsibly disclosing this vulnerability.\n\n### How can I report a security bug?\n\nPlease report security vulnerabilities privately via [the \"Security and quality\" tab on the PHPCSUtils repository](https://github.com/PHPCSStandards/PHPCSUtils/security).","aliases":["CVE-2026-65954"],"modified":"2026-09-29T18:15:05.846489115Z","published":"2026-09-29T17:57:16Z","database_specific":{"github_reviewed_at":"2026-09-29T17:57:16Z","nvd_published_at":null,"cwe_ids":["CWE-95"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/PHPCSStandards/PHPCSUtils/security/advisories/GHSA-r6hr-vr92-vv28"},{"type":"WEB","url":"https://github.com/PHPCSStandards/PHPCSUtils/pull/778"},{"type":"WEB","url":"https://github.com/PHPCSStandards/PHPCSUtils/commit/9f596b50ea4498ea57b8cb341e920233b044debf"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/phpcsstandards/phpcsutils/CVE-2026-65954.yaml"},{"type":"PACKAGE","url":"https://github.com/PHPCSStandards/PHPCSUtils"}],"affected":[{"package":{"name":"phpcsstandards/phpcsutils","ecosystem":"Packagist","purl":"pkg:composer/phpcsstandards/phpcsutils"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.0.0-alpha1"},{"fixed":"1.2.3"}]}],"versions":["1.0.0","1.0.0-alpha1","1.0.0-alpha2","1.0.0-alpha3","1.0.0-alpha4","1.0.0-rc1","1.0.1","1.0.10","1.0.11","1.0.12","1.0.2","1.0.3","1.0.4","1.0.5","1.0.6","1.0.7","1.0.8","1.0.9","1.1.0","1.1.1","1.1.2","1.1.3","1.2.0","1.2.1","1.2.2"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-r6hr-vr92-vv28/GHSA-r6hr-vr92-vv28.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"}]}