CVE-2026-49459

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.

• CWE-79
• CWE-693
• CWE-1321

• https://github.com/cure53/DOMPurify/commit/bb7739e5bccec7e1ab3dae3f3e42d02db3acaaaePatch
• https://github.com/cure53/DOMPurify/releases/tag/3.4.6Release Notes
• https://github.com/cure53/DOMPurify/security/advisories/GHSA-r47g-fvhr-h676Exploit, Mitigation, Vendor Advisory
• https://github.com/cure53/DOMPurify/security/advisories/GHSA-r47g-fvhr-h676Exploit, Mitigation, Vendor Advisory

Published

Jul 14, 2026

Last Modified

Jul 21, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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