{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.1.70"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "191372c1bbebbd36fb55af79a84b9984861390ff"
            },
            {
              "fixed": "dd73e702820c146a192969800ee674ecdb208365"
            },
            {
              "fixed": "e7ea668fd569fc9903fb1c431d47d58f2daad2f2"
            }
          ],
          "repo": "https://github.com/studio-42/elfinder",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-gxmj-r5rf-ggwq"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-434"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81891.json"
  },
  "details": "elFinder is an open-source file manager for web, written in JavaScript using jQuery UI. Prior to 2.1.70, checkExtractItems() in php/elFinderVolumeDriver.class.php calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize(). Because the .phtml, .phar, .php5, and .php3 extensions are absent from mime.types, the staticMimeMap entries that map them to text/x-php are not applied, and allowPutMime() permits extraction even when uploadDeny blocks text/x-php. An attacker with ZIP upload permission can extract PHP-executable files into a web-accessible files/ directory and achieve remote code execution when the server executes those extensions. This issue is fixed in version 2.1.70.",
  "id": "CVE-2026-81891",
  "modified": "2026-09-03T03:30:16.414414334Z",
  "published": "2026-08-31T20:33:22.283Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Studio-42/elFinder/releases/tag/2.1.70"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81891.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-81891"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ff"
    },
    {
      "type": "FIX",
      "url": "https://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "elFinder: ZIP extraction bypasses uploadDeny MIME filter allowing PHP file upload (RCE)"
}