What is CVE-2026-41238?

CVE-2026-41238 is a medium-severity vulnerability in Cure53 Dompurify, classified under Cross-site Scripting. CVSS score: 6.9/10. Published 2026-04-23.

How severe is CVE-2026-41238?

Medium severity. CVSS v3 base score is 6.9 out of 10.

XSS in Cure53 Dompurify

CVE-2026-41238

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses `DOMPurify.sanitize()` with the default confi…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (12.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N.

Affected products

Cure53 Dompurify — versions >= 3.0.1, < 3.4.0

Weakness classification (CWE)

References

https://github.com/cure53/DOMPurify/security/advisories/GHSA-v9jr-rg53-9pgp (x_refsource_CONFIRM)
https://github.com/cure53/DOMPurify/releases/tag/3.4.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-41238?: CVE-2026-41238 is a medium-severity vulnerability in Cure53 Dompurify, classified under Cross-site Scripting. CVSS score: 6.9/10. Published 2026-04-23.
How severe is CVE-2026-41238?: Medium severity. CVSS v3 base score is 6.9 out of 10.