CVE-2026-34601
HIGH SEVERITYCVSS Score & Metrics
Base Score
7.5 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-91
Source
GitHub
Vendor
npm
Product
xmldom
External References
- https://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp
- 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/advisories/GHSA-wh4c-j3r5-mjhp
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