CVE-2026-47423

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.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea	Patch
https://github.com/cure53/DOMPurify/releases/tag/3.4.5	Release Notes
https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx	Exploit Vendor Advisory
https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

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

History

24 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) DOMPurify es un saneador de cross-site scripting solo de DOM para HTML, MathML y SVG. En la versión 3.4.4, DOMPurify permitía selectedcontent por defecto, lo que permitía a los navegadores volver a clonar una carga útil de XSS después de la sanitización para que el marcado no saneado dentro de [selectedcontent] fuera devuelto. Este problema está solucionado en la versión 3.4.5.

Information

Published : 2026-07-14 20:17

Updated : 2026-10-24 21:10

NVD link : CVE-2026-47423

Mitre link : CVE-2026-47423

CVE.ORG link : CVE-2026-47423

JSON object : View

Products Affected

cure53

dompurify

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

{"id": "CVE-2026-47423", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47423", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-16T14:46:50.385097Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 8.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.7, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "cure53", "product": "DOMPurify", "versions": [{"status": "affected", "version": ">= 3.4.4, < 3.4.5"}]}]}], "published": "2026-07-14T20:17:02.143", "references": [{"url": "https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/cure53/DOMPurify/releases/tag/3.4.5", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx", "tags": ["Exploit", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx", "tags": ["Exploit", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-79"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "DOMPurify es un saneador de cross-site scripting solo de DOM para HTML, MathML y SVG. En la versi\u00f3n 3.4.4, DOMPurify permit\u00eda selectedcontent por defecto, lo que permit\u00eda a los navegadores volver a clonar una carga \u00fatil de XSS despu\u00e9s de la sanitizaci\u00f3n para que el marcado no saneado dentro de [selectedcontent] fuera devuelto. Este problema est\u00e1 solucionado en la versi\u00f3n 3.4.5."}], "lastModified": "2026-10-24T21:10:00.130", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cure53:dompurify:3.4.4:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "80014D50-0DE5-4BAC-8A6A-D9B48C9896B3"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}