Cross-site Scripting (XSS)

DOMPurify is vulnerable to Cross-site Scripting XSS. The vulnerability is due to failure to execute the afterSanitizeElements hook for custom elements allowed through CUSTOMELEMENTHANDLING.tagNameCheck, allowing sensitive attributes to bypass sanitization and be reused in innerHTML sinks to execu...

EUVD-2026-48582

DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOMELEMENTHANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into...