CVE-2026-65912

DOMPurify before 3.3.2 contains a URI validation bypass vulnerability when ADD_ATTR is provided as a predicate function via EXTRA_ELEMENT_HANDLING.attributeCheck. Attackers can supply a predicate that accepts specific attribute and tag combinations to bypass URI-safe validation, allowing unsafe protocols like javascript: to survive sanitization and execute as DOM-based XSS when the link is activated.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/cure53/DOMPurify/security/advisories/GHSA-cjmm-f4jc-qw8r	Third Party Advisory
https://www.vulncheck.com/advisories/dompurify-before-uri-validation-bypass-via-add-attr	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*

History

24 Oct 2026, 13:10

Type	Values Removed	Values Added
Summary		(es) DOMPurify anterior a la versión 3.3.2 contiene una vulnerabilidad de omisión de validación de URI cuando ADD_ATTR se proporciona como una función predicado a través de EXTRA_ELEMENT_HANDLING.attributeCheck. Los atacantes pueden proporcionar un predicado que acepta combinaciones específicas de atributos y etiquetas para omitir la validación de URI segura, permitiendo que protocolos inseguros como javascript_disabled: sobrevivan a la sanitización y se ejecuten como XSS basado en DOM cuando el enlace se activa.

Information

Published : 2026-07-23 14:18

Updated : 2026-10-24 13:10

NVD link : CVE-2026-65912

Mitre link : CVE-2026-65912

CVE.ORG link : CVE-2026-65912

JSON object : View

Products Affected

cure53

dompurify

CWE

CWE-79

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

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