CVE-2026-67434: Squizlabs/php codesniffer PHP_CodeSniffer Gitblame Report Command Injection Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hmqg-cxww-wqhq",
  "modified" : "2026-08-06T21:31:34Z",
  "published" : "2026-08-06T21:31:34Z",
  "aliases" : [ "CVE-2026-67434" ],
  "summary" : "PHP_CodeSniffer gitblame report command injection via crafted filename",
  "details" : "### Impact\n\nPHP_CodeSniffer versions before v3.13.6 and v4.0.2 contain a command injection vulnerability in the code creating the `Gitblame`, `Hgblame` and `Svnblame` report(s).\n\nAs a result, running PHP_CodeSniffer over untrusted files, for example, in a CI pipeline that scans pull requests, or on a developer machine reviewing third-party code, could result in attacker-controlled shell commands being executed when the `Gitblame`, `Hgblame` or `Svnblame` report(s) would process a file whose name contains shell metacharacters.\n\n* Users using the default `Full` report, or any of the other non-*blame reports, are not affected.\n* Users on a runtime platform which does not allow filenames to contain shell metacharacters, such as `\"` and `;`, are not affected.\n\n### Patched versions\n\nThe issue has been fixed in PHP_CodeSniffer v3.13.6 and v4.0.2. We recommend all users upgrade to these versions at their earliest convenience.\n\n### Workaround\n\nUsers of PHP_CodeSniffer who cannot upgrade immediately should ensure they do not use the `Gitblame`, `Hgblame` or the `Svnblame` reports when scanning untrusted code.\n\nThis is especially relevant for CI jobs, pre-commit or review tooling, automated review services, and any service that scans untrusted repositories or uploaded source trees.\n\n### Credits\n\nMany thanks to both [@Faze-up](https://github.com/Faze-up) and [@edorian](https://github.com/edorian) 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 PHP_CodeSniffer repository](https://github.com/PHPCSStandards/PHP_CodeSniffer/security).",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "squizlabs/php_codesniffer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.13.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "squizlabs/php_codesniffer"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.0.0"
      }, {
        "fixed" : "4.0.2"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/PHPCSStandards/PHP_CodeSniffer/security/advisories/GHSA-hmqg-cxww-wqhq"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PHPCSStandards/PHP_CodeSniffer/pull/1473"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PHPCSStandards/PHP_CodeSniffer/commit/7a3a6bbf153a03fa3a9413afc60bded6b764e76b"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PHPCSStandards/PHP_CodeSniffer/commit/f0e1ebb0563f0e5d7f190497a787bcaf8474f3fe"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/FriendsOfPHP/security-advisories/blob/master/squizlabs/php_codesniffer/CVE-2026-67434.yaml"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/PHPCSStandards/PHP_CodeSniffer"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/3.13.6"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/PHPCSStandards/PHP_CodeSniffer/releases/tag/4.0.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-78" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-06T21:31:34Z",
    "nvd_published_at" : null
  }
}