CVE-2026-47423 | DOMPurify is a DOM-only cross-site scripting sanitizer for H… | CVSS 8.2 HIGH

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.

Metadata

CVE ID: CVE-2026-47423
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-19 19:37 UTC
Published: 2026-07-14 19:56 UTC
Last updated: 2026-07-14 19:56 UTC
Primary CWE: CWE-79
CWE-79: Improper Neutralization of Input During Web Page Gen…
Vendor / Product: cure53 / DOMPurify
Sources: cve.org · NVD

Severity & Metrics

8.2 HIGH CVSS 3.1

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

Affected products (1)

Vendor	Product	Platform	Versions
cure53	DOMPurify	—	>= 3.4.4, < 3.4.5

Weakness (CWE)

CWE	Source	Description
CWE-79	cna	CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSS scores (1)

Score	Severity	Version	Source	Vector
8.2	HIGH	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

References (3)

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