CVE-2026-54182: Laravel Backpack CRUD OS Command Injection Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mrc5-3mm3-45c5",
  "modified" : "2026-08-20T18:38:55Z",
  "published" : "2026-08-20T18:38:55Z",
  "aliases" : [ "CVE-2026-54182" ],
  "summary" : "Laravel Backpack CRUD: OS command injection in Stats::makeCurlRequest via attacker-controlled Host header (pre-auth)",
  "details" : "## Summary\n\n`Backpack\\CRUD\\Stats::makeCurlRequest` builds a shell command using unescaped input that originates from the HTTP `Host` header, then passes it to `exec()`. A specially crafted Host header can break out of the shell argument and cause the server to execute arbitrary OS commands as the web user.\n\nThe vulnerable code path is reached from `BackpackServiceProvider::boot()` on every HTTP request in production when `exec()` and `curl` are available. A 1-in-100 random gate is the only guard — an attacker can reliably trigger it by retrying.\n\n## Severity\n\n**High — CVSS 8.1**  \n`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`\n\nAttack Complexity is rated **High** because default nginx and Apache configurations typically strip or reject malformed Host headers before they reach PHP, and `exec()` is often disabled for web processes in hardened environments. Both mitigations must be absent for exploitation.\n\n## Impact\n\nA successful exploit yields OS command execution as the web server user (`www-data`, `nginx`, etc.), giving an unauthenticated attacker access to environment secrets (APP_KEY, database credentials, API keys in `.env`), the filesystem, and any service the server can reach.\n\n## Fix\n\n`makeCurlRequest` was replaced with the Guzzle-based path already present in the codebase, eliminating the shell-command construction entirely. **Upgrade to a patched release immediately.**\n\n## Affected versions\n\n| Branch | Vulnerable range | First safe version |\n|--------|-----------------|-------------------|\n| 4.1.x  | `< 4.1.70`      | 4.1.70            |\n| 5.x    | `< 5.6.2`       | 5.6.2             |\n| 6.x    | `< 6.8.13`      | 6.8.13            |\n| 7.x    | `< 7.0.36`      | 7.0.36            |\n\n## Credits\n\nReported by Vishal Shukla ([@shukla304](https://github.com/shukla304)) via sechub.dev AI Agent.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "backpack/crud"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "4.1.0"
      }, {
        "fixed" : "4.1.72"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "backpack/crud"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.0.0"
      }, {
        "fixed" : "5.6.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "backpack/crud"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "fixed" : "6.8.13"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "backpack/crud"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "7.0.0"
      }, {
        "fixed" : "7.0.36"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Laravel-Backpack/CRUD/security/advisories/GHSA-mrc5-3mm3-45c5"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Laravel-Backpack/CRUD"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Laravel-Backpack/CRUD/releases/tag/4.1.72"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Laravel-Backpack/CRUD/releases/tag/5.6.2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Laravel-Backpack/CRUD/releases/tag/6.8.13"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Laravel-Backpack/CRUD/releases/tag/7.0.36"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-116", "CWE-20", "CWE-78" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-20T18:38:55Z",
    "nvd_published_at" : null
  }
}