CVE-2026-81891
CVE-2026-81891 · elFinder: ZIP extraction bypasses uploadDeny MIME filter allowing PHP file upload (RCE)
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.1 · High · EPSS 0.9% · Fix available
- Published
- Updated
Stack: php
Affected products and versions
elfinder
- Versions
- < 2.1.70: Affected
No fix published
studio-42/elfinder Packagist
- Affected ranges
- ECOSYSTEM: < 2.1.70
Update to 2.1.70
Original sources
- https://github.com/Studio-42/elFinder/security/advisories/GHSA-gxmj-r5rf-ggwq
- https://github.com/Studio-42/elFinder/commit/191372c1bbebbd36fb55af79a84b9984861390ff
- https://github.com/Studio-42/elFinder/commit/dd73e702820c146a192969800ee674ecdb208365
- https://github.com/Studio-42/elFinder/releases/tag/2.1.70
- https://nvd.nist.gov/vuln/detail/CVE-2026-81891