{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:concretecms:concrete_cms:9.4.7:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "9.4.7"
              },
              {
                "last_affected": "9.4.7"
              }
            ],
            "source": "CPE_STRING"
          },
          "events": [
            {
              "introduced": "f2a9fc77537f412c3e5a30e46924c07987020dd7"
            },
            {
              "last_affected": "f2a9fc77537f412c3e5a30e46924c07987020dd7"
            }
          ],
          "repo": "https://github.com/concretecms/concretecms",
          "type": "GIT"
        }
      ],
      "versions": [
        "9.4.7"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30662.json"
  },
  "details": "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.",
  "id": "CVE-2026-30662",
  "modified": "2026-07-15T01:49:06.468616607Z",
  "published": "2026-03-24T00:00:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://wang1rrr.github.io/2026/02/11/CVE-Report-ConcreteCMS-DoS/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30662.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-30662"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}