CVE-2026-47423

DOMPurify XSS via `selectedcontent` re-clone

At a glance

Severity: HIGH 8.2
EPSS: EPSS 0.41 % · percentile 35 (2026-10-27)
State: PUBLISHED
Published: 2026-07-14
Updated: 2026-07-16
Assigner: GitHub_M
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N	GitHub_M
CVSS 3.1	HIGH 8.2	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N	NVD · security-advisories@github.com (Secondary)

Weaknesses (CWE)

CWE-79

Advisories

GHSA-87xg-pxx2-7hvx — DOMPurify XSS via selectedcontent re-clone

European references

ENISA EUVD · EUVD-2026-44443
GCVE · GCVE-0-2026-47423

Affected configurations (NVD CPE)

cpe:2.3:a:cure53:dompurify:3.4.4:*:*:*:*:*:*:*

Affected products

Product	Versions
cure53 · DOMPurify	affected >= 3.4.4, < 3.4.5

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD