Vulnerability · Published Sep 23, 2026 · Assigned by GitHub_M

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

Critical 10.0

In plain English

A critical-severity cross-site scripting in suneditor from JiHong88. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)0.5%top 57.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	suneditor	2.47.11	GHSA-6rf4-v2fh-m6p4

Affected products (as reported)

Vendor	Product	Versions
JiHong88	suneditor	< 2.47.11

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4 x_refsource_CONFIRM
https://github.com/JiHong88/suneditor/issues/1646 x_refsource_MISC
https://github.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045 x_refsource_MISC
https://github.com/JiHong88/suneditor/releases/tag/2.47.11 x_refsource_MISC