CVE-2026-47423
DOMPurify XSS via selectedcontent re-clone
- Published
- Jul 14, 2026
- Updated
- Jul 16, 2026
- Assigning CNA
- GitHub_M
- Evidence observed
- Aug 28, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:NLow · next 30 days
- Percentile
- 34.9%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
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.
Sources
1Go-based scanner that detects DOMPurify sanitizer bypass (CVE-2026-47423) via logic fingerprinting on minified production JavaScript bundles, identifying unpatched allowed-tag layouts.
Responsible use
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