Cross-Site Scripting Vulnerability in DOMPurify by Cure53
CVE-2026-41239

6.8MEDIUM

Key Information:

Vendor

Cure53

Status
Dompurify
Vendor
CVE Published:
23 April 2026

What is CVE-2026-41239?

A security issue exists in DOMPurify affecting versions prior to 3.4.0, where the SAFE_FOR_TEMPLATES configuration fails to adequately sanitize variables used in templating engines, specifically when using the RETURN_DOM and RETURN_DOM_FRAGMENT modes. This oversight allows malicious scripts to execute via unfiltered input in frameworks such as Vue 2, significantly compromising web application security. Version 3.4.0 addresses this vulnerability by enhancing the sanitization process.

Affected Version(s)

DOMPurify >= 1.0.10, < 3.4.0

References

https://github.com/cure53/DOMPurify/security/advisories/G...
x_refsource_CONFIRM
https://github.com/cure53/DOMPurify/releases/tag/3.4.0
x_refsource_MISC

CVSS V3.1

Score:
6.8
Severity:
MEDIUM
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.