CVE-2026-83609

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/xmldom/xmldom/commit/7b2ec67e1750daadd0bb06c92e875e726544a362
https://github.com/xmldom/xmldom/pull/1071
https://github.com/xmldom/xmldom/releases/tag/0.9.12
https://github.com/xmldom/xmldom/security/advisories/GHSA-3px3-54cx-rmw9

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-01 15:17

Updated : 2026-09-08 21:11

NVD link : CVE-2026-83609

Mitre link : CVE-2026-83609

CVE.ORG link : CVE-2026-83609

JSON object : View

Products Affected

No product.

CWE

CWE-91

XML Injection (aka Blind XPath Injection)

CWE-625

Permissive Regular Expression

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