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CVE-2026-59167

CVE-2026-59167 · SunEditor: Critical XSS vulnerability - sanitizer bypass

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 10.0 · Critical · EPSS 0.5% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • suneditor

    Versions
    • < 2.47.11: Affected

    No fix published

  • suneditor npm

    Affected ranges
    • SEMVER: < 2.47.11

    Update to 2.47.11

Original sources

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