CVE-2026-41239: CURE53 Dompurify

Medium severity, CVSS 6.8. EPSS: 0.4% chance of exploitation in the next 30 days.

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Starting in version 1.0.10 and prior to version 3.4.0, `SAFE_FOR_TEMPLATES` strips `{{...}}` expressions from untrusted HTML. This works in string mode but not with `RETURN_DOM` or `RETURN_DOM_FRAGMENT`, allowing XSS via template-evaluating frameworks like Vue 2. Version 3.4.0 patches the issue.

Affected products

• CURE53 Dompurify: from 1.0.10, before 3.4.0 (fixed in 3.4.0)

Published 2026-04-23. Last modified 2026-06-17.