CVE-2026-83609

The record

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 packages

Related vulnerabilities

• CVE-2026-2310 IBM webMethods Integration Server 11.1 IBM webMethods Integration is vulnerable to an XML… CWE-91
• CVE-2026-83617 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and… CWE-91
• CVE-2026-83616 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and… CWE-91
• CVE-2026-83618 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and… CWE-91
• CVE-2026-83608 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and… CWE-91
• CVE-2026-83605 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and… CWE-91
• CVE-2026-83607 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and… CWE-91
• CVE-2026-24329 A flaw was found in wildfly-core. CWE-91