CVE-2026-83607

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Document.createElement(tagName) stores an unvalidated element name and XMLSerializer.serializeToString() emits that name verbatim. The requireWellFormed: true path did not validate the element qualified name or synthesized xmlns:PREFIX declaration, so attacker-controlled tag names could inject attributes, elements, or processing instructions into serialized XML or HTML and could cause cross-site scripting when browser-consumed. The unchecked values violate the XML QName constraint, and default serialization and creation-time createElement() behavior remain permissive. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; no fixed version is available for xmldom.

• CWE-91

• https://github.com/xmldom/xmldom/commit/cba1321218b069182695813fa7565653708e172e
• https://github.com/xmldom/xmldom/commit/d8212e632507eaf1d9f609657dd4c56abeb12d44
• https://github.com/xmldom/xmldom/pull/1043
• https://github.com/xmldom/xmldom/pull/1050
• https://github.com/xmldom/xmldom/releases/tag/0.8.14
• https://github.com/xmldom/xmldom/releases/tag/0.9.11
• https://github.com/xmldom/xmldom/security/advisories/GHSA-w2rr-34g9-rvrj
• https://github.com/xmldom/xmldom/security/advisories/GHSA-w2rr-34g9-rvrj

Published

Sep 1, 2026

Last Modified

Sep 8, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-83600Netdata is an open source observability tool. Prior to 2.10.…6.5
• CVE-2026-83601Netdata is an open source observability tool. Prior to 2.10.…6.5
• CVE-2026-83602Netdata is an open source observability tool. From 2.0.0 unt…6.5
• CVE-2026-83603Netdata is an open source observability tool. Prior to 2.10.…8.4
• CVE-2026-83605xmldom is a pure JavaScript W3C standard-based (XML DOM Leve…8.7
• CVE-2026-83606xmldom is a pure JavaScript W3C standard-based (XML DOM Leve…8.7
• CVE-2026-83608xmldom is a pure JavaScript W3C standard-based (XML DOM Leve…8.7
• CVE-2026-83609xmldom is a pure JavaScript W3C standard-based (XML DOM Leve…8.7
• CVE-2026-8361A path traversal vulnerability exists in WOSDefaultHttpModul…7.5
• CVE-2026-83610xmldom is a pure JavaScript W3C standard-based (XML DOM Leve…6.3
• CVE-2026-83611xmldom is a pure JavaScript W3C standard-based (XML DOM Leve…6.9
• CVE-2026-83612xmldom is a pure JavaScript W3C standard-based (XML DOM Leve…8.7