{
  "cveId": "CVE-2026-52747",
  "url": "https://patchblox.com/security/cve/CVE-2026-52747",
  "summary": "CVE-2026-52747 is fixed in modsecurity on 1 platform by DEBIAN-CVE-2026-52747 (version 3.0.16-1), released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "modsecurity: ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx",
  "description": "ModSecurity is an open source, cross platform web application firewall (WAF) engine for Apache, IIS and Nginx. Prior to 3.0.16, the multipart/form-data request body parser in libmodsecurity silently removes embedded line breaks from non-file form-field values before exporting them to ARGS and ARGS_POST because src/request_body_processor/multipart.cc overwrites reserved bytes in m_reserve instead of appending the current buffer. This creates a parser differential between ModSecurity and backend applications that preserve line breaks in form fields, allowing rules that inspect ARGS or ARGS_POST to miss payloads whose dangerous syntax depends on a line break. This issue is fixed in version 3.0.16.",
  "published": "2026-07-10T22:16:42Z",
  "severity": "high",
  "cvss": 8.6,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N",
  "epss": 0.00476,
  "epssPercentile": 0.4135,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "modsecurity",
      "release": "Debian 14",
      "fixedVersion": "3.0.16-1",
      "fix": "DEBIAN-CVE-2026-52747",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-52747",
      "released": "2026-07-20T12:58:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}