SEPTEMBER 11, 2026
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Case File

CVE-2026-49459

MEDIUM · CVSS 6.1 EPSS 0.30% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-14 · Last synced 2026-08-13

CyberRota Analysis

AI-Generated

DOMPurify versions prior to 3.4.6 are vulnerable to a cross-site scripting (XSS) attack, where malicious event-handler attributes can be preserved on attacker-controlled `<form>` elements due to improper sanitization of descendant properties. This vulnerability could allow attackers to execute arbitrary scripts in the context of the user’s browser, potentially compromising sensitive information. Developers and organizations using DOMPurify for sanitizing user input should prioritize upgrading to version 3.4.6 or later to mitigate this risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

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CVE
CVE-2026-49459
Severity
MEDIUM
CVSS
6.1
EPSS
0.30%

Original NVD 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.

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