CVE-2026-63222: CodeIgniter Path Traversal Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-hhmc-q9hp-r662",
  "modified" : "2026-08-07T18:23:46Z",
  "published" : "2026-08-07T18:23:46Z",
  "aliases" : [ "CVE-2026-63222" ],
  "summary" : "CodeIgniter: Path traversal in UploadedFile::move() when using client-provided filenames",
  "details" : "### Impact\nIn affected versions, calling `UploadedFile::move()` **without a second argument** uses the client-provided filename without sanitization. Depending on the destination path and server configuration, an attacker can supply a filename containing path traversal sequences (e.g. `../../public/shell.php`) to write uploaded content outside the intended upload directory.\n\nThe patch sanitizes this default (no-argument) path.\n\n**Note:** The patch only sanitizes the filename when no second argument is passed. If your application **explicitly** passes a client-provided name as the second argument, you remain responsible for sanitizing it - the patch does not (and cannot) sanitize a caller-supplied filename:\n```php\n// Unsafe - even after upgrading:\n$file->move(WRITEPATH . 'uploads', $file->getName());\n$file->move(WRITEPATH . 'uploads', $file->getClientName());\n```\n\n### Patches\nUpgrade to v4.7.4 or later.\n\n### Workarounds\nIf you cannot upgrade immediately, use a generated filename or sanitize the client filename before passing it to `move()`.\n\nUse a generated filename:\n```php\n$file->move(WRITEPATH . 'uploads', $file->getRandomName());\n```\nOr sanitize the client filename before passing it to `move()`:\n```php\nhelper('security');\n\n$name = sanitize_filename($file->getClientName());\n$file->move(WRITEPATH . 'uploads', $name);\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Packagist",
      "name" : "codeigniter4/framework"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.7.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/codeigniter4/CodeIgniter4/security/advisories/GHSA-hhmc-q9hp-r662"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63222"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/codeigniter4/CodeIgniter4/commit/20ebcf4694d96d3c97fbc3938e360730e4f54618"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/codeigniter4/CodeIgniter4"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/codeigniter4/CodeIgniter4/releases/tag/v4.7.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-07T18:23:46Z",
    "nvd_published_at" : "2026-07-31T06:16:31Z"
  }
}