CVE-2026-83608

A flaw was found in xmldom, a JavaScript module for parsing and serializing XML. A remote attacker can exploit this vulnerability by providing a specially crafted DocumentType.name containing characters like > or whitespace. This bypasses the requireWellFormed validation, allowing the injection of arbitrary XML markup. Such injection can lead to unintended modifications of the XML document structure, potentially resulting in arbitrary code execution or information disclosure within applications that process the affected XML.

This is an Important flaw due to XML markup injection in xmldom that bypasses DOCTYPE name validation. This vulnerability could allow an attacker to inject arbitrary XML content, potentially compromising data integrity in Red Hat products that process untrusted XML input via the affected library.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.