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DOMPurify Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2026-49459 - Vulnerability Database
DOMPurify

DOMPurify Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability - CVE-2026-49459

Medium
Reference: CVE-2026-49459
NVD Link: https://nvd.nist.gov/vuln/detail/CVE-2026-49459
Title: DOMPurify Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) Vulnerability
Overview:

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 ltformgt 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.