CVE-2026-83614
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 versions 0.3.0 through 0.6.0, two independent quadratic paths can cause denial of service. In lib/sax.js, parseElementStartPart repeatedly rescans a malformed tag name to the next > during single-character recovery; in lib/dom.js, normalize() repeatedly removes and appends adjacent text nodes, causing quadratic reindexing and string rebuilding. The first path is reachable through default DOMParser.parseFromString() processing, while the second is also reachable through a direct normalize() call on a programmatically constructed DOM, and endDocument invokes that normalization after parsing. 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) >=0.7.0 <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 0.9.12Related 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