CVE-2026-65913

DOMPurify before 3.3.2 contains a prototype pollution vulnerability in USE_PROFILES mode that allows attackers to bypass attribute filtering by polluting Array.prototype properties. Attackers can set Array.prototype properties like onclick to true, causing DOMPurify to accept event handlers as allowlisted attributes and resulting in DOM-based XSS when sanitized markup is rendered.

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-cj63-jhhr-wcxv	Third Party Advisory
https://www.vulncheck.com/advisories/dompurify-before-prototype-pollution-via-use-profiles	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 contaminación de prototipos en modo USE_PROFILES que permite a los atacantes eludir el filtrado de atributos al contaminar las propiedades de Array.prototype. Los atacantes pueden establecer propiedades de Array.prototype como onclick a verdadero, lo que hace que DOMPurify acepte manejadores de eventos como atributos permitidos y resultando en XSS basado en DOM cuando el marcado saneado es renderizado.

Information

Published : 2026-07-23 14:18

Updated : 2026-10-24 13:10

NVD link : CVE-2026-65913

Mitre link : CVE-2026-65913

CVE.ORG link : CVE-2026-65913

JSON object : View

Products Affected

cure53

dompurify

CWE

CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

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