{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.9.10"
              },
              {
                "fixed": "0.9.12"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "bf396a575c4dd32ce4bd925b849dcb7e778d957c"
            },
            {
              "fixed": "7b2ec67e1750daadd0bb06c92e875e726544a362"
            },
            {
              "fixed": "0af8cf829d8a92bbac612903422c6947f5458f06"
            }
          ],
          "repo": "https://github.com/xmldom/xmldom",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-vr34-hp96-76pp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-625",
      "CWE-91"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83618.json"
  },
  "details": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.10 until 0.9.12, the requireWellFormed: true serializer validates DocumentType.publicId and DocumentType.systemId with PubidLiteral_match and SystemLiteral_match expressions produced by reg() in lib/grammar.js, which inherit the multiline flag. A complete valid literal on the first line can therefore satisfy the matcher while U+000A, U+000D, U+2028, or U+2029 and breakout markup remain in the emitted \u003c!DOCTYPE ...\u003e declaration. This bypasses the strict-serialization mitigation for the earlier DocumentType injection advisory; creation and direct property assignment remain unvalidated by design. This issue is fixed in @xmldom/xmldom version 0.9.12.",
  "id": "CVE-2026-83618",
  "modified": "2026-09-05T03:30:40.393478188Z",
  "published": "2026-09-01T14:49:46.201Z",
  "references": [
    {
      "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-2026-83618.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-vr34-hp96-76pp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83618"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xmldom/xmldom/commit/7b2ec67e1750daadd0bb06c92e875e726544a362"
    },
    {
      "type": "FIX",
      "url": "https://github.com/xmldom/xmldom/pull/1071"
    }
  ],
  "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: requireWellFormed DocType publicId/systemId validation is bypassable via an embedded line terminator"
}