{
  "cveId": "CVE-2026-83608",
  "url": "https://patchblox.com/security/cve/CVE-2026-83608",
  "summary": "CVE-2026-83608 is fixed in node-xmldom on 1 platform by DEBIAN-CVE-2026-83608 (version 0.9.12-1), released September 8, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "xmldom: DocType \u0060name\u0060 Injection Bypasses requireWellFormed",
  "description": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, the DOCUMENT_TYPE_NODE branch in lib/dom.js validates publicId, systemId, and internalSubset under requireWellFormed: true but emits DocumentType.name verbatim. A name containing \u003E or whitespace can terminate the \u003C!DOCTYPE ...\u003E declaration and inject sibling markup; the value can be supplied through createDocumentType() on the 0.8.x and unscoped lines or through a direct DocumentType.name property write on every affected line. The default path and legacy creation-time behavior remain permissive, while the vulnerable strict path fails to enforce an XML Name. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.",
  "published": "2026-09-01T15:17:38Z",
  "severity": "Important",
  "cwe": "XML Injection (aka Blind XPath Injection)",
  "epss": 0.00612,
  "epssPercentile": 0.49551,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83608",
  "fixes": [
    {
      "platform": "linux",
      "product": "node-xmldom",
      "release": "Debian 14",
      "fixedVersion": "0.9.12-1",
      "fix": "DEBIAN-CVE-2026-83608",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-83608",
      "released": "2026-09-08T02:27:47Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}