CVE-2026-41239 MEDIUM

CVE-2026-41239: DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

Vendor Cure53
Product DOMPurify
Weakness CWE-79 · XSS
Published April 23, 2026
Last update April 25, 2026
View on NVD All CVEs

CVSS base score

6.8/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 23, 2026 CVE published
April 25, 2026 Record updated