---
id: CVE-2026-59167
title: >-
  SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript
  with no dependencies
summary: >-
  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…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-79
vendor: JiHong88
product: suneditor
affected:
  - suneditor < 2.47.11
published: '2026-09-23'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T18:12:04.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-59167'
references:
  - url: >-
      https://github.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045
    label: security-advisories@github.com
  - url: 'https://github.com/JiHong88/suneditor/issues/1646'
    label: security-advisories@github.com
  - url: 'https://github.com/JiHong88/suneditor/releases/tag/2.47.11'
    label: security-advisories@github.com
  - url: >-
      https://github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-23T14:25:29.800Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.