CVE-2026-66010

Published: Lug 24, 2026 Last Modified: Lug 24, 2026

ExploitDB:

Other exploit source:

Google Dorks:

MEDIUM 5,1

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: active

Confidentiality: N/A

Integrity: N/A

Availability: N/A

MEDIUM 6,1

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: none

User Interaction: required

Scope: changed

Confidentiality: low

Integrity: low

Availability: none

Description

AI Translation Available

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.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control Confidentiality Integrity Availability

Potential Impacts:

Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands

Applicable Platforms

Technologies: AI/ML, Web Based, Web Server

Likelihood of Exploit: High

View CWE Details

https://github.com/cure53/DOMPurify/security/advisories/GHS…

https://github.com/cure53/DOMPurify/security/advisories/GHSA-c2j3-45gr-mqc4