FKIE_CVE-2026-30662

Vulnerability from fkie_nvd - Published: 2026-03-24 15:16 - Updated: 2026-03-24 20:16
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
cve@mitre.orghttps://wang1rrr.github.io/2026/02/11/CVE-Report-ConcreteCMS-DoS/Exploit, Third Party Advisory
Impacted products
Vendor Product Version
concretecms concrete_cms 9.4.7
To clipboard 

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  "descriptions": [
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      "value": "ConcreteCMS v9.4.7 contains a Denial of Service (DoS) vulnerability in the File Manager component. The \u0027download\u0027 method in \u0027concrete/controllers/backend/file.php\u0027 improperly manages memory when creating zip archives. It uses \u0027ZipArchive::addFromString\u0027 combined with \u0027file_get_contents\u0027, 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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      "value": "ConcreteCMS v9.4.7 contiene una vulnerabilidad de denegaci\u00f3n de servicio (DoS) en el componente del Administrador de Archivos. El m\u00e9todo \u0027download\u0027 en \u0027concrete/controllers/backend/file.php\u0027 gestiona incorrectamente la memoria al crear archivos zip. Utiliza \u0027ZipArchive::addFromString\u0027 combinado con \u0027file_get_contents\u0027, lo que carga el contenido completo de cada archivo seleccionado en la memoria PHP. Un atacante autenticado puede explotar esto solicitando una descarga masiva de archivos grandes, lo que desencadena una condici\u00f3n de Out-Of-Memory (OOM) que provoca la terminaci\u00f3n del proceso PHP-FPM (SIGSEGV) y que el servidor web devuelva un error 500."
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  "id": "CVE-2026-30662",
  "lastModified": "2026-03-24T20:16:27.010",
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          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
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  "published": "2026-03-24T15:16:34.457",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.