Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-49458

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(node, { IN_PLACE: true }) accepted same-origin foreign-realm DOM nodes while follow-on checks used parent-realm constructors, causing instanceof checks for forms, named node maps, document fragments, and elements to fail and skip clobber, template-content, and shadow-DOM sanitization branches so executable markup could survive. This issue is fixed in version 3.4.6.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 31.0%
CVSS Severity
CVSS v3 Score 6.1
Products affected by CVE-2026-49458


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