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.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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Fixes
Solution
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Workaround
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References
History
Tue, 24 Mar 2026 14:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
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MITRE
Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2026-03-24T14:19:16.045Z
Reserved: 2026-03-04T00:00:00.000Z
Link: CVE-2026-30662
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-03-24T15:16:34.457
Modified: 2026-03-24T15:53:48.067
Link: CVE-2026-30662
Redhat
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OpenCVE Enrichment
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Weaknesses
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