🛡️ CVE-2026-30662
🟡 CVSS 6.5 — Medium ⚠️ Exploit Public CWE-400 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE CWE-400
Public Exploit ⚠️ Yes
Source NVD
Published 2026-03-24
Updated 2026-06-02
Modified 2026-03-24
Fix URL N/A

Affected Packages

Software From version Fixed in
concrete-cms
concrete5/concrete5

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