CVE-2026-47423 — HIGH (8.2)

Vulnerability Description

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside <selectedcontent> is returned. This issue is fixed in version 3.4.5.

CVSS Score

8.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

HIGH

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Cure53	Dompurify	3.4.4

Related Weaknesses (CWE)

CWE-79

References

https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e6Patch
https://github.com/cure53/DOMPurify/releases/tag/3.4.5Release Notes
https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvxExploitVendor Advisory
https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvxExploitVendor Advisory

FAQ

What is CVE-2026-47423?

CVE-2026-47423 is a vulnerability with a CVSS score of 8.2 (HIGH). DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitizatio...

How severe is CVE-2026-47423?

CVE-2026-47423 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-47423?

Check the references section above for vendor advisories and patch information. Affected products include: Cure53 Dompurify.