CVE-2026-41239

DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

State: Published
Severity: 6.8 Medium
Published: Apr 23, 2026
Updated: Apr 25, 2026
Reserved: Apr 18, 2026

Description

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.

Scores

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

Weaknesses

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

Affected Products

Product	Versions
DOMPurifycure53	>= 1.0.10, < 3.4.0Affected

References

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