CVE-2026-34601
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Deferred - security-advisories@github.com
- Published
- 2026-04-02
- Last modified
- 2026-07-15
- Weaknesses
- CWE-91
Affected products
- Ansible Portal (Redhat)
- Jboss Fuse (Redhat)
- Migration Toolkit Applications (Redhat)
- Openshift (Redhat)
- Openshift Ai (Redhat)
- Openshift Devspaces (Redhat)
- Podman Desktop (Redhat)
- Rhdh (Redhat)
- Xmldom (Xmldom)
References
- 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://access.redhat.com/security/cve/CVE-2026-34601
- https://bugzilla.redhat.com/show_bug.cgi?id=2454595
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34601.json
