High severity · published Jul 14, 2026
CVE-2026-47423
DOMPurify XSS via `selectedcontent` re-clone
8.2
CVSS
0.4%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DO
DOMPurify · cure53
>= 3.4.4, < 3.4.5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47423
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47423
Patch
https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea
Release Notes
https://github.com/cure53/DOMPurify/releases/tag/3.4.5
Exploit
https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx
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