What’s Vulnerable › Vulnerabilities

CVE-2026-47423: DOMPurify XSS via `selectedcontent` re-clone

• Severity: high (CVSS 8.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-07-14 · updated 2026-10-24
• Weakness: CWE-79

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.

Affected products

• cure53 DOMPurify: 3.4.4

References

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

Get alerted when CVE-2026-47423 or the next vulnerability affects your stack