CVE-2026-47423CWE-79

DOMPurify XSS via `selectedcontent` re-clone

High · published July 14, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
34.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00410 · 34.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-07-14T19:56Z
EPSS history
Timeline
  • 14 JUL 19:56Z
    DOMPurify XSS via `selectedcontent` re-clone
    cvelistv5