Description

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 configuration (no `CUSTOM_ELEMENT_HANDLING` option), a prior prototype pollution gadget can inject permissive `tagNameCheck` and `attributeNameCheck` regex values into `Object.prototype`, causing DOMPurify to allow arbitrary custom elements with arbitrary attributes — including event handlers — through sanitization. Version 3.4.0 fixes the issue.

INFO

Published Date :

2026-04-23T14:43:17.730Z

Last Modified :

2026-04-23T16:22:34.174Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-41238 vulnerability.

Vendors Products
Cure53
  • Dompurify
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-41238.

URL Resource
https://github.com/cure53/DOMPurify/releases/tag/3.4.0 cve-icon cve-icon cve-icon
https://github.com/cure53/DOMPurify/security/advisories/GHSA-v9jr-rg53-9pgp cve-icon cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-41238 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-41238 cve-icon
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