Security Advisory

CVE-2026-66010

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-24 12:07:57

Last updated 2026-07-24 14:14:08

Assigner VulnCheck

CVSS score 5.1

State PUBLISHED

Description

DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets.

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