CVE-2026-47423: CURE53 Dompurify

High severity, CVSS 8.2. EPSS: 0.4% chance of exploitation in the next 30 days.

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside <selectedcontent> is returned. This issue is fixed in version 3.4.5.

Affected products

• CURE53 Dompurify: version 3.4.4 only

Published 2026-07-14. Last modified 2026-07-21.