CVE-2026-41239 PUBLISHED

DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

Assigner: GitHub_M
Reserved: 18.04.2026 Published: 23.04.2026 Updated: 23.04.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS Score: 6.8

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	None	Integrity Impact	High
User Interaction	Required	Availability Impact	None

CVSS 3.1

Product Status

Vendor	cure53
Product	DOMPurify
Versions	Version >= 1.0.10, < 3.4.0 is affected

References

Problem Types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE
CWE-1289: Improper Validation of Unsafe Equivalence in Input CWE