CVE-2026-34601
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
02/04/2026
Last modified:
03/04/2026
Description
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In xmldom versions 0.6.0 and prior and @xmldom/xmldom prior to versions 0.8.12 and 0.9.9, xmldom/xmldom allows attacker-controlled strings containing the CDATA terminator ]]> to be inserted into a CDATASection node. During serialization, XMLSerializer emitted the CDATA content verbatim without rejecting or safely splitting the terminator. As a result, data intended to remain text-only became active XML markup in the serialized output, enabling XML structure injection and downstream business-logic manipulation. This issue has been patched in xmldom version 0.6.0 and @xmldom/xmldom versions 0.8.12 and 0.9.9.
Impact
Base Score 3.x
7.50
Severity 3.x
HIGH
References to Advisories, Solutions, and Tools
- https://github.com/xmldom/xmldom/commit/2b852e836ab86dbbd6cbaf0537f584dd0b5ac184
- https://github.com/xmldom/xmldom/releases/tag/0.8.12
- https://github.com/xmldom/xmldom/releases/tag/0.9.9
- https://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp
- https://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp