CVE-2026-83613

Summary

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 Software

VendorProductVersion RangeStatus
xmldomxmldom<= 0.6.0affected
@xmldomxmldom>= 0.9.0, < 0.9.12affected
@xmldomxmldom>= 0.7.0, < 0.8.15affected

Weaknesses

  • CWE-407: CWE-407: Inefficient Algorithmic Complexity

References