CVE-2026-41239

MEDIUM 6.8

DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

CVSS Score

6.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79 CWE-1289
Vendor	cure53
Product	dompurify
Published	Apr 23, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

cure53 / DOMPurify

>= 1.0.10, < 3.4.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/cure53/DOMPurify/security/advisories/GHSA-crv5-9vww-q3g8 github.com: https://github.com/cure53/DOMPurify/releases/tag/3.4.0