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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-83607

xmldom: Element name injection via createElement() bypasses requireWellFormed

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Document.createElement(tagName) stores an unvalidated element name and XMLSerializer.serializeToString() emits that name verbatim. The requireWellFormed: true path did not validate the element qualified name or synthesized xmlns:PREFIX declaration, so attacker-controlled tag names could inject attributes, elements, or processing instructions into serialized XML or HTML and could cause cross-site scripting when browser-consumed. The unchecked values violate the XML QName constraint, and default serialization and creation-time createElement() behavior remain permissive. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; no fixed version is available for xmldom.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

xmldom xmldom

  • <= 0.6.0affected

@xmldom xmldom

  • >= 0.7.0, < 0.8.14affected
  • >= 0.9.0, < 0.9.11affected

References