CVE-2026-83613
Published:September 01, 2026
Updated:September 02, 2026
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 Packages
https://github.com/xmldom/xmldom.git (GITHUB):
Affected version(s) >=0.9.0 <0.9.12Fix Suggestion:
Update to version 0.9.12https://github.com/xmldom/xmldom.git (GITHUB):
Affected version(s) >=0.7.0 <0.8.15Fix Suggestion:
Update to version 0.8.15@xmldom/xmldom (NPM):
Affected version(s) >=0.9.0 <0.9.12Fix Suggestion:
Update to version 0.9.12@xmldom/xmldom (NPM):
Affected version(s) >=0.7.0 <0.8.15Fix Suggestion:
Update to version 0.8.15Related Resources (7)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Inefficient Algorithmic Complexity