CVE-2026-83610

01/Description

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, Document.createEntityReference(name) accepts an invalid name and the ENTITY_REFERENCE_NODE serializer emits the resulting nodeName directly in &name; form. Directly serializing the node or fragment with XMLSerializer.serializeToString() and requireWellFormed: true can therefore break the entity-reference boundary and produce attacker-controlled XML markup when reparsed. The parser does not ordinarily create these nodes, and element-child insertion is rejected, so exploitation requires an application to create and directly serialize an EntityReference. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.

02/References8

• github.com/xmldom/xmldom/commit/4664386e4f4d99d17b416a151dbe832…
• github.com/xmldom/xmldom/commit/6c3fb5ffeafe7901ec928ce9010988d…
• github.com/xmldom/xmldom/pull/1071
• github.com/xmldom/xmldom/pull/1072
• github.com/xmldom/xmldom/releases/tag/0.8.15
• github.com/xmldom/xmldom/releases/tag/0.9.12
• github.com/xmldom/xmldom/security/advisories/GHSA-6gmq-8vp8-gcm6
• github.com/xmldom/xmldom/security/advisories/GHSA-6gmq-8vp8-gcm6