CVE-2026-46609— Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| umbraco | Umbraco-CMS | >= 14.0.0, < 17.4.0 | affected |
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I. Basic Information for CVE-2026-46609
Vulnerability Information
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Vulnerability Title
Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog
Source: NVD (National Vulnerability Database)
Vulnerability Description
Umbraco is an ASP.NET CMS. From version 14.0.0 to before version 17.4.0, authenticated users are able to inject HTML into an input field, which is rendered in the confirmation dialog without proper output encoding. This issue has been patched in version 17.4.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Umbraco 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Umbraco是丹麦Umbraco公司的一套C#编写的开源的内容管理系统（CMS）。 Umbraco 14.0.0版本至17.4.0之前版本存在跨站脚本漏洞，该漏洞源于经过身份验证的用户可在输入字段中注入HTML，在确认对话框中未正确编码输出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| umbraco | Umbraco-CMS | >= 14.0.0, < 17.4.0 | - |
II. Public POCs for CVE-2026-46609
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-46609 (1)
IV. Related Vulnerabilities
Same product: Umbraco-CMS
- CVE-2026-46616
Umbraco.Cms: Open Redirect Vulnerability in Surface Controll - CVE-2026-31834
Umbraco Affected by Vertical Privilege Escalation via Missin - CVE-2026-31833
Umbraco has Stored XSS in UFM Rendering Pipeline via Permiss - CVE-2026-31832
Umbraco Backoffice API Allows Unauthorized Modification of D - CVE-2025-66625
Umbraco Vulnerable to Improper File Access and Credential Ex
Same vendor: umbraco
- CVE-2026-46616
Umbraco.Cms: Open Redirect Vulnerability in Surface Controll - CVE-2026-31834
Umbraco Affected by Vertical Privilege Escalation via Missin - CVE-2026-31833
Umbraco has Stored XSS in UFM Rendering Pipeline via Permiss - CVE-2026-31832
Umbraco Backoffice API Allows Unauthorized Modification of D - CVE-2026-27449
Umbraco.Engage.Forms Allows Unauthorized Access to Multiple
Same weakness: CWE-79
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Microsoft Edge (Chromium-based) Spoofing Vulnerability - CVE-2026-12621
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GridTime™ 3000 GNSS Time Server CSRF to XSS - CVE-2026-12430
Blocksy Companion <= 2.1.45 - Authenticated (Editor+) Stored - CVE-2026-12157
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V. Comments for CVE-2026-46609
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