CVE-2026-30662

Descripción

ConcreteCMS v9.4.7 contains a Denial of Service (DoS) vulnerability in the File Manager component. The -download- method in -concrete/controllers/backend/file.php- improperly manages memory when creating zip archives. It uses -ZipArchive::addFromString- combined with -file_get_contents-, which loads the entire content of every selected file into PHP memory. An authenticated attacker can exploit this by requesting a bulk download of large files, triggering an Out-Of-Memory (OOM) condition that causes the PHP-FPM process to terminate (SIGSEGV) and the web server to return a 500 error.