CVE-2026-46609
Medium
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.
SeverityMedium
CVSS4.6
Exploit probability3. percentile0.1%
Product
Umbraco Cms
PublishedJun 10, 2026
First seenJun 10, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- umbraco umbraco_cms17.4.0 or later
- Umbraco.Cms17.4.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| umbraco umbraco_cms | 14.0.0 ≤ v < 17.4.0 | 17.4.0 |
| Umbraco.CmsNuGet | 14.0.0 ≤ v < 17.4.0 | 17.4.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.