SunEditor: Critical XSS vulnerability - sanitizer bypass (CVE-2026-59167) | HOL Guard CVE

Critical · CVSS 10.0CVE-2026-59167

SunEditor: Critical XSS vulnerability - sanitizer bypass

Answer in brief

CVE-2026-59167 records a Critical severity (CVSS 10.0) vulnerability in SunEditor: Critical XSS vulnerability - sanitizer bypass. The current sources do not mark it as known exploited. The current feed maps JiHong88/suneditor (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 23, 2026Updated Sep 23, 2026Source checked Sep 23, 2026First seen by HOL Sep 23, 2026Material review Sep 23, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 10.0
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 10.0. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps JiHong88/suneditor (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
JiHong88/suneditorgeneric	<2.47.11	2.47.11

Recommended response

Check inventory. Check lockfiles and deployed manifests for JiHong88/suneditor.
Review the reported fix. Update JiHong88/suneditor to 2.47.11 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 23, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 23, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.