CVE-2026-59167

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.

Overview

State: PUBLISHED
Assigner (CNA): GitHub_M
CVSS severity: CRITICAL
CVSS score: 10.0 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Effective score: 10.0 / 10 CRITICAL source: CNA overview
CWE(s): CWE-79
Reserved: 2026-07-02
Published: 2026-09-23 13:52 UTC
Last updated: 2026-09-23 13:52 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/59xxx/CVE-2026-59167.json
Linked Threat: CVE-2026-59167 — SunEditor: Critical XSS vulnerability - sanitizer bypass

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-23 14:17:07 UTC
NVD last modified: 2026-09-23 18:12:04 UTC
NVD CVSS v3.1: 10.0 / 10 CRITICAL source: security-advisories@github.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 6.0 / 10

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-85324
Assigner: GitHub_M
Published: Sep 23, 2026, 1:52:56 PM
Updated: Sep 23, 2026, 1:52:56 PM
EUVD base score (CVSS 3.1): 10.0 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EUVD-reported EPSS: 0.0000
Vendors: JiHong88
Products: suneditor (< 2.47.11)

ENISA 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.

EUVD references (4)

Affected products (1)

Vendor	Product	Versions	Platforms
JiHong88	suneditor	`< 2.47.11` (affected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

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

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

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

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

Cisco Advance Notification for Publication of September 16, 2026 ...

web:sec.cloudapps.cisco.com

On September 16, 2026 , the Cisco Product Security Incident Response Team (PSIRT) published the advisories that are listed in the following tables. To remediate these vulnerabilities, Cisco strongly recommends that customers upgrade to the fixed software that is indicated in the advisories. For more information about changes in Cisco PSIRT vulnerability disclosure, see Strengthening the ...

2026-09-24 11:13 UTC
Microsoft Patch Tracker (September 2026): Exploit-Ranked | Senserva

web:senserva.com

Every Microsoft security patch (KB) and the CVEs it fixes, with severity, CVSS, and CISA KEV status. Cross-linked to the CVE reference.

2026-09-24 11:13 UTC
Description of the security update for Office 2016: August 11, 2026 ...

web:support.microsoft.com

Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2016. It doesn't apply to the Office 2016 Click-to-Run editions, such as Microsoft Office 365 Home. (See What version of Office am I using?) How to get and install the update Method 1: Microsoft Update This update is available from Microsoft Update. When you turn on ...

2026-09-24 11:13 UTC
What Is CVE Remediation in 2026? - aikido.dev

web:www.aikido.dev

CVE remediation is fixing known flaws in the software you run. Why upgrading often fails, what remediation actually involves, and how backporting fixes it.

2026-09-24 11:13 UTC
DSA-2026-359: Security Update for Dell OpenManage Enterprise ...

web:www.dell.com

Dell OpenManage Enterprise remediation is available for multiple security vulnerabilities that may be exploited by malicious users to compromise the affected system.

2026-09-24 11:13 UTC
DSA-2026-309: Security Update for Dell Command | Update for Multiple ...

web:www.dell.com

Dell Command | Update remediation is available for multiple security vulnerabilities that could be exploited by malicious users to compromise affected systems.

2026-09-24 11:13 UTC
Oracle Critical Patch Update Advisory - July 2026

web:www.oracle.com

This Critical Patch Update contains 1448 new security patches across the product families listed below. Please note that a My Oracle Support (MOS) note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at July 2026 Critical Patch Update: Executive Summary and Analysis.

2026-09-24 11:13 UTC
CISA KEV September 16, 2026: Three CVE Patch Analysis

web:www.secpod.com

Patch Timeline & Exploitation Gap Analysis The September 16, 2026 dataset contains three CISA KEV vulnerabilities. Each record was added to the catalog on September 16, 2026 and assigned a remediation deadline of September 19, 2026 . Consequently, all three vulnerabilities have an identical three-calendar-day KEV inclusion-to- remediation window.

2026-09-24 11:13 UTC
July 2026 Patch Tuesday: Largest Patch Tuesday 569 CVEs - Tenable

web:www.tenable.com

Microsoft patched 569 CVEs in July 2026 , the largest Patch Tuesday release in its history. 56 critical CVEs patched including three zero-day vulnerabilities.

2026-09-24 11:13 UTC
Patch Tuesday September 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's September 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-09-24 11:13 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-59167.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "suneditor",
          "vendor": "JiHong88",
          "versions": [
            {
              "status": "affected",
              "version": "< 2.47.11"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-23T13:52:56.747Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/JiHong88/suneditor/security/advisories/GHSA-6rf4-v2fh-m6p4"
        },
        {
          "name": "https://github.com/JiHong88/suneditor/issues/1646",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/JiHong88/suneditor/issues/1646"
        },
        {
          "name": "https://github.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/JiHong88/suneditor/commit/a94ace269c7102bfb6de58a27a6547bc4eb09045"
        },
        {
          "name": "https://github.com/JiHong88/suneditor/releases/tag/2.47.11",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/JiHong88/suneditor/releases/tag/2.47.11"
        }
      ],
      "source": {
        "advisory": "GHSA-6rf4-v2fh-m6p4",
        "discovery": "UNKNOWN"
      },
      "title": "SunEditor: Critical XSS vulnerability - sanitizer bypass"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-59167",
    "datePublished": "2026-09-23T13:52:56.747Z",
    "dateReserved": "2026-07-02T16:50:27.887Z",
    "dateUpdated": "2026-09-23T13:52:56.747Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}