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CVE-2026-59167

10.0 · CRITICAL

SunEditor is a lightweight and powerful WYSIWYG editor in vanilla JavaScript with no dependencies.

Published Sep 23, 2026CWE-79EPSS 0.50%

Overview

CVE-2026-59167 is a critical-severity vulnerability. It was published on September 23, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045GitHubgithub.com/JiHong88/suneditor/issues/1646GitHubgithub.com/JiHong88/suneditor/releases/tag/2.47.11GitHubgithub.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4GitHubgithub.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-59167?

CVE-2026-59167 is a critical-severity vulnerability. It was published on September 23, 2026 and has a CVSS 3.1 base score of 10.0 (CRITICAL).

How severe is CVE-2026-59167?

This vulnerability has a CVSS 3.1 base score of 10.0, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-59167?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-59167?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-59167 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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