CVE-2026-47423

HIGH 8.2

DOMPurify XSS via `selectedcontent` re-clone

CVSS Score

8.2

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	cure53
Product	dompurify
Published	Jul 14, 2026

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CVSS v3 Breakdown

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 Versions

cure53 / DOMPurify

>= 3.4.4, < 3.4.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx github.com: https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea github.com: https://github.com/cure53/DOMPurify/releases/tag/3.4.5