CVE-2026-83618

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Source
https://cve.org/CVERecord?id=CVE-2026-83618
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83618.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-83618
Aliases
Downstream
Published
2026-09-01T14:49:46Z
Modified
2026-10-28T02:30:54Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
xmldom: requireWellFormed DocType publicId/systemId validation is bypassable via an embedded line terminator
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 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.

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"
}
References

Affected packages

Git / github.com/xmldom/xmldom

Affected ranges

Type
GIT
Repo
https://github.com/xmldom/xmldom
Events
Introduced
bf396a575c4dd32ce4bd925b849dcb7e778d957c
Fixed
0af8cf829d8a92bbac612903422c6947f5458f06
Fixed
7b2ec67e1750daadd0bb06c92e875e726544a362
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0.9.10"
                },
                {
                    "fixed": "0.9.12"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "fixed": "7b2ec67e1750daadd0bb06c92e875e726544a362"
                }
            ],
            "source": "REFERENCES_COMMIT"
        },
        {
            "original_tag": "0.9.12",
            "range": [
                {
                    "fixed": "0af8cf829d8a92bbac612903422c6947f5458f06"
                }
            ],
            "source": "REFERENCES_TAG"
        }
    ]
}

Affected versions

0.*
0.9.10
0.9.11

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83618.json"