CVE-2026-47423

Description

DOMPurify XSS via selectedcontent re-clone

Description (MITRE) cveawg.mitre.org

Pulled from cveawg.mitre.org/api/cve/CVE-2026-47423 on 2026-07-27. Shown when MITRE's text differs from the cvelistV5 mirror.

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.

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

8.2 / 10

CVSS vector

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

Effective score

8.2 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-47423

Linked Threat

CVE-2026-47423 — CVE-2026-47423

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published

2026-07-14 20:17:02 UTC

NVD last modified

2026-07-21 19:50:48 UTC

NVD CVSS v3.1

8.2 / 10 HIGH source: security-advisories@github.com

NVD CVSS vector

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

Exploitability subscore

2.8 / 10

Impact subscore

4.7 / 10

EPSS score

0.0027 (probability of exploitation in next 30 days)

EPSS percentile

18.93% vs all CVEs — higher = more likely to be exploited, as of 2026-07-27

NVD-assigned CWE(s): CWE-79 (differs from the CNA list above)

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-44443

Assigner

GitHub_M

Published

Jul 14, 2026, 7:56:02 PM

Updated

Jul 16, 2026, 2:47:21 PM

EUVD base score (CVSS 3.1)

8.2 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N

EUVD-reported EPSS

0.2700

Vendors

cure53

Products

DOMPurify (3.4.4, < 3.4.5)

Aliases

GHSA-87xg-pxx2-7hvx

ENISA 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.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

MITRE references (3) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

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

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-47423 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-47423 tenable:www.cve.org

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