CVE-2026-83609

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Source
https://cve.org/CVERecord?id=CVE-2026-83609
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83609.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-83609
Aliases
  • GHSA-3px3-54cx-rmw9
Downstream
Published
2026-09-01T14:29:40.475Z
Modified
2026-09-03T03:48:17.082569134Z
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: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path
Details

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0 until 0.9.12, the shared reg() builder in lib/grammar.js compiles the anchored QName_exact validator with the multiline flag, so ^ and $ validate only one line instead of the complete name. createElementNS, createAttributeNS, createDocumentType, and createAttribute consequently accept a malformed XML name whose first line is valid and whose later text injects markup when serialized through either the default path or requireWellFormed: true. The triggering ECMAScript line terminators are U+000A, U+000D, U+2028, and U+2029. This issue is fixed in @xmldom/xmldom version 0.9.12.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83609.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-625",
        "CWE-91"
    ]
}
References

Affected packages

Git / github.com/xmldom/xmldom

Affected ranges

Type
GIT
Repo
https://github.com/xmldom/xmldom
Events
Introduced
8c7c7afe89027641aa59c101d20eefedc0f54c6f
Fixed
7b2ec67e1750daadd0bb06c92e875e726544a362
Fixed
0af8cf829d8a92bbac612903422c6947f5458f06
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0.9.0"
        },
        {
            "fixed": "0.9.12"
        }
    ]
}

Affected versions

0.*
0.9.0
0.9.1
0.9.10
0.9.11
0.9.2
0.9.3
0.9.4
0.9.5
0.9.6
0.9.7
0.9.8
0.9.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83609.json"