What is CVE-2026-41239?

CVE-2026-41239 is a medium-severity vulnerability in Cure53 Dompurify, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-04-23.

How severe is CVE-2026-41239?

Medium severity. CVSS v3 base score is 6.8 out of 10.

XSS in Cure53 Dompurify

CVE-2026-41239

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 n…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (18.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.

Affected products

Cure53 Dompurify — versions >= 1.0.10, < 3.4.0

Weakness classification (CWE)

References

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

Frequently asked questions

What is CVE-2026-41239?: CVE-2026-41239 is a medium-severity vulnerability in Cure53 Dompurify, classified under Cross-site Scripting. CVSS score: 6.8/10. Published 2026-04-23.
How severe is CVE-2026-41239?: Medium severity. CVSS v3 base score is 6.8 out of 10.