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.
INFO
Published Date :
2026-03-24T00:00:00.000Z
Last Modified :
2026-03-24T18:49:37.326Z
Source :
mitre
AFFECTED PRODUCTS
The following products are affected by CVE-2026-30662 vulnerability.
| Vendors | Products |
|---|---|
| Concretecms |
|
REFERENCES
Here, you will find a curated list of external links that provide in-depth information to CVE-2026-30662.
