CVE-2026-41239CWE-1289CWE-79

DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode

Medium · published April 23, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
34.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00414 · 34.6th percentile
Weaknesses
CWE-1289 · Improper Validation of Unsafe Equivalence in Input; CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-04-23T14:47Z
EPSS history
Timeline
  • 23 APR 14:47Z
    DOMPurify has a SAFE_FOR_TEMPLATES bypass in RETURN_DOM mode
    cvelistv5