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8.7 High

CVE-2026-83613 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module

Description

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, DOMHandler.startElement in lib/dom-parser.js inserts every parsed attribute through setAttributeNode, while NamedNodeMap.setNamedItem in lib/dom.js calls the linear getNamedItem or getNamedItemNS lookup for each insertion. A well-formed element with many distinct attributes therefore requires quadratic comparisons during DOMParser.parseFromString() and can stall a Node.js event loop before application validation. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.

Affected products and versions

Product Affected versions Fixed in
xmldom 0.6 earliest → 0.6.0 No fix stated
xmldom 0.9 0.9.0 → < 0.9.12 0.9.12
xmldom 0.7 0.7.0 → < 0.8.15 0.8.15

References

Timeline

  1. Published
  2. Last modified

Other CVEs of xmldom

The 23 CVEs of xmldom →
CVE-2026-83619 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module 8.7 High CVE-2026-83618 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module 8.7 High CVE-2026-83617 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module 8.7 High CVE-2026-83616 xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module 8.7 High
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