{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "0.6.0"
              },
              {
                "introduced": "0.9.0"
              },
              {
                "fixed": "0.9.12"
              },
              {
                "introduced": "0.7.0"
              },
              {
                "fixed": "0.8.15"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "8c7c7afe89027641aa59c101d20eefedc0f54c6f"
            },
            {
              "introduced": "c568938641cc1f121cef5b4df80fcfda1e489b6e"
            },
            {
              "fixed": "0af8cf829d8a92bbac612903422c6947f5458f06"
            },
            {
              "fixed": "b5b8fb5b579ae1183b34e74b3bc39d7eb50a226a"
            },
            {
              "fixed": "57aec90ac57b4408ae7c5d1746bf2a693b5ed90e"
            },
            {
              "fixed": "85f12eb4d14b44de33216cfb72b50af4d24e9fdd"
            }
          ],
          "repo": "https://github.com/xmldom/xmldom",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-27p8-2357-5qqv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-91"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83608.json"
  },
  "details": "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.",
  "id": "CVE-2026-83608",
  "modified": "2026-09-05T03:31:01.947617045Z",
  "published": "2026-09-01T14:27:26.057Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/xmldom/xmldom/releases/tag/0.8.15"
    },
    {
      "type": "WEB",
      "url": "https://github.com/xmldom/xmldom/releases/tag/0.9.12"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83608.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-27p8-2357-5qqv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83608"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xmldom/xmldom/commit/57aec90ac57b4408ae7c5d1746bf2a693b5ed90e"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xmldom/xmldom/commit/85f12eb4d14b44de33216cfb72b50af4d24e9fdd"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xmldom/xmldom/pull/1071"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xmldom/xmldom/pull/1072"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "xmldom: DocType `name` Injection Bypasses requireWellFormed"
}