{"id":"CVE-2026-83610","aliases":["GHSA-6gmq-8vp8-gcm6"],"url":"https://o3.security/vulnerability/CVE-2026-83610","summary":"xmldom: XML fragment injection via invalid EntityReference.nodeName during requireWellFormed serialization","details":"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.","published":"2026-09-01T14:31:49.409Z","modified":"2026-09-05T03:30:24.281978923Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"@xmldom/xmldom","fixedVersion":"0.8.15"},{"ecosystem":"npm","name":"@xmldom/xmldom","fixedVersion":"0.9.12"},{"ecosystem":"npm","name":"xmldom","fixedVersion":null}],"fix":{"url":"https://github.com/xmldom/xmldom/commit/4664386e4f4d99d17b416a151dbe8323e245284b","label":"xmldom/xmldom@4664386"},"references":[{"type":"WEB","url":"https://github.com/xmldom/xmldom/releases/tag/0.8.15"},{"type":"WEB","url":"https://github.com/xmldom/xmldom/releases/tag/0.9.12"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83610.json"},{"type":"ADVISORY","url":"https://github.com/xmldom/xmldom/security/advisories/GHSA-6gmq-8vp8-gcm6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-83610"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/4664386e4f4d99d17b416a151dbe8323e245284b"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/commit/6c3fb5ffeafe7901ec928ce9010988dd716c94a0"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/pull/1071"},{"type":"FIX","url":"https://github.com/xmldom/xmldom/pull/1072"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-05T03:30:24.281978923Z"}}