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CVE-2026-83609 (GCVE-0-2026-83609)

Vulnerability from cvelistv5 – Published: 2026-09-01 14:29 – Updated: 2026-09-01 18:10
VLAI
Title
xmldom: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path
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.
Severity
8.7 (High)
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
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 17:34 UTC
CWE
  • CWE-91 - XML Injection (aka Blind XPath Injection)
  • CWE-625 - Permissive Regular Expression
Assigner
References
Impacted products
Vendor Product Version CPE status
xmldom xmldom Affected: >= 0.9.0, < 0.9.12
guessed Create a notification for this product.
@xmldom xmldom Affected: >= 0.9.0, < 0.9.12
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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