CVE WatchSep 24, 2026

CVE-2026-59167

SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 2.47.11, the sanitizer in src/li

CVSS

10.0

Critical

EPSS

0.4%

p32

KEV

—

Exploit Today

0-100

Published: Sep 23, 2026 · Last modified: Sep 24, 2026 · CWE-79

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-09-242026-10-19

Technical description

SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies. Prior to 2.47.11, the sanitizer in src/lib/core.js does not consistently reject namespaced or custom HTML elements, allowing event-handler attributes to remain on crafted elements. When an application renders attacker-controlled editor content and a user interacts with the element, the retained handler can execute script in the application's browser origin, enabling stored cross-site scripting, data exposure, or unauthorized browser-context actions. This issue is fixed in version 2.47.11.

Official references

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