Vulnerabilities CVE-2026-49459

CVE-2026-49459

Medium

Open

TLP:CLEAR

DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM

NVD CVE.org

Critical Infrastructure

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Description

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.

Details

CVSS Score: 6.1
EPSS Score ⓘ: 0.30%

22.8th percentile
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Confidence: 90%
Published: Jul 14, 2026
Last Modified: Jul 15, 2026

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