# CVE-2026-41239

## Summary

- **CVE ID:** CVE-2026-41239
- **Severity:** MEDIUM
- **CVSS Score:** 6.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N)
- **CWE:** CWE-79, CWE-1289
- **Published:** Apr 23, 2026
- **Last Modified:** Apr 25, 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.

## Affected Products

- cure53 — DOMPurify (>= 1.0.10, < 3.4.0)

## References

- [CNA](https://github.com/cure53/DOMPurify/security/advisories/GHSA-crv5-9vww-q3g8)
- [CNA](https://github.com/cure53/DOMPurify/releases/tag/3.4.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.25%
- **EPSS Percentile:** 16.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._