DOMPurify Cross-Site Scripting Vulnerability in Version 3.4.4 by Cure53
CVE-2026-47423

8.2HIGH

Key Information:

Vendor

Cure53

Status
Dompurify
Vendor
CVE Published:
14 July 2026

What is CVE-2026-47423?

A flaw in DOMPurify version 3.4.4 allowed for the unsanitized return of markup within , enabling potential re-cloning of XSS payloads. This issue has been addressed in version 3.4.5, which enhances the security measures for handling sanitization processes.

Affected Version(s)

DOMPurify >= 3.4.4, < 3.4.5

References

https://github.com/cure53/DOMPurify/security/advisories/G...
x_refsource_CONFIRM
https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f5...
x_refsource_MISC
https://github.com/cure53/DOMPurify/releases/tag/3.4.5
x_refsource_MISC

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.