CVE-2026-83609

Summary

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.

Affected Software

VendorProductVersion RangeStatus
xmldomxmldom>= 0.9.0, < 0.9.12affected
@xmldomxmldom>= 0.9.0, < 0.9.12affected

Weaknesses

  • CWE-91: CWE-91: XML Injection (aka Blind XPath Injection)
  • CWE-625: CWE-625: Permissive Regular Expression

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References