CVE-2026-47423

DOMPurify XSS via `selectedcontent` re-clone

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.

Affected

cure53 · DOMPurify

CVSS v3.1 GITHUB

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

EPSS

0.41% chance of exploitation in the next 30 days, 34th percentile

Published

2026-07-14

Updated

2026-07-16

Proof-of-concept exploits (1)

• advisories/GHSA-87xg-pxx2-7hvx

Security advisories

• cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx
• cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea

References

• CVE Record
• NVD entry