What’s Vulnerable › Vulnerabilities

CVE-2026-65913: DOMPurify before 3.3.2 Prototype Pollution via USE_PROFILES

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-23 · updated 2026-10-24
• Weakness: CWE-1321

Description

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.

Affected products

• cure53 DOMPurify: before 3.3.2 — fixed in 3.3.2

How to fix

Upgrade to a fixed version: cure53 DOMPurify 3.3.2. Check the vendor advisory for mitigations.

References

• https://github.com/cure53/DOMPurify/security/advisories/GHSA-cj63-jhhr-wcxv
• https://www.vulncheck.com/advisories/dompurify-before-prototype-pollution-via-use-profiles

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