Emerging Threat: (CVE-2026-81891) elFinder Remote Code Execution via ZIP Extraction MIME Bypass
CVE-2026-81891 is an unrestricted file upload vulnerability in Studio 42 elFinder, an open source web file manager embedded in a wide range of PHP applications and content management systems. The flaw sits in the checkExtractItems() function in php/elFinderVolumeDriver.class.php, which calls mimetypeInternalDetect() without passing the result through mimeTypeNormalize().