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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
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://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34601.json

Configurations

No configuration.

History

No history.

Information

Published : 2026-04-02 18:16

Updated : 2026-07-21 19:10

NVD link : CVE-2026-34601

Mitre link : CVE-2026-34601

CVE.ORG link : CVE-2026-34601

JSON object : View

Products Affected

No product.

CWE

CWE-91

XML Injection (aka Blind XPath Injection)

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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."}, {"lang": "es", "value": "xmldom es un m\u00f3dulo de JavaScript puro basado en el est\u00e1ndar W3C (XML DOM Nivel 2 Core) para 'DOMParser' y 'XMLSerializer'. En las versiones 0.6.0 y anteriores de xmldom y en @xmldom/xmldom anteriores a las versiones 0.8.12 y 0.9.9, xmldom/xmldom permite que cadenas controladas por el atacante que contienen el terminador CDATA ]]> sean insertadas en un nodo CDATASection. Durante la serializaci\u00f3n, 'XMLSerializer' emit\u00eda el contenido CDATA textualmente sin rechazar o dividir de forma segura el terminador. Como resultado, los datos destinados a permanecer solo como texto se convirtieron en marcado XML activo en la salida serializada, lo que permit\u00eda la inyecci\u00f3n de estructura XML y la manipulaci\u00f3n de la l\u00f3gica de negocio posterior. Este problema ha sido parcheado en la versi\u00f3n 0.6.0 de xmldom y en las versiones 0.8.12 y 0.9.9 de @xmldom/xmldom."}], "lastModified": "2026-07-21T19:10:00.107", "sourceIdentifier": "security-advisories@github.com"}