{
  "cveId": "CVE-2026-83607",
  "url": "https://patchblox.com/security/cve/CVE-2026-83607",
  "summary": "CVE-2026-83607 is fixed in node-xmldom on 1 platform by DEBIAN-CVE-2026-83607 (version 0.9.11-1), released September 2, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "xmldom: Element name injection via createElement() 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 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Document.createElement(tagName) stores an unvalidated element name and XMLSerializer.serializeToString() emits that name verbatim. The requireWellFormed: true path did not validate the element qualified name or synthesized xmlns:PREFIX declaration, so attacker-controlled tag names could inject attributes, elements, or processing instructions into serialized XML or HTML and could cause cross-site scripting when browser-consumed. The unchecked values violate the XML QName constraint, and default serialization and creation-time createElement() behavior remain permissive. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; 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": 0.49552,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83607",
  "fixes": [
    {
      "platform": "linux",
      "product": "node-xmldom",
      "release": "Debian 14",
      "fixedVersion": "0.9.11-1",
      "fix": "DEBIAN-CVE-2026-83607",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-83607",
      "released": "2026-09-02T01:26:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}