CVE-2026-83605
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 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Element.setAttribute() calls the private _createAttribute(name) path without validating the attribute name, while Document.createAttribute(name) validates against QName. XMLSerializer.serializeToString() emits attribute names verbatim, and requireWellFormed: true did not validate them, so a crafted name can terminate the intended attribute and inject additional attributes, including event handlers, into browser-consumed output; synthesized xmlns:PREFIX declarations expose the same unchecked-name boundary. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; no fixed version is available for xmldom.
Affected Packages
https://github.com/xmldom/xmldom.git (GITHUB):
Affected version(s) >=0.9.0 <0.9.11Fix Suggestion:
Update to version 0.9.11https://github.com/xmldom/xmldom.git (GITHUB):
Affected version(s) >=0.7.0 <0.8.14Fix Suggestion:
Update to version 0.8.14@xmldom/xmldom (NPM):
Affected version(s) >=0.9.0 <0.9.11Fix Suggestion:
Update to version 0.9.11@xmldom/xmldom (NPM):
Affected version(s) >=0.7.0 <0.8.14Fix Suggestion:
Update to version 0.8.14Related 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
HIGH
Vulnerable System Availability
NONE
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
HIGH
Availability
NONE
Weakness Type (CWE)
XML Injection (aka Blind XPath Injection)