medium4.6
CVE-2026-46609
Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| nuget | Umbraco.Cms | >= 14.0.0, <= 17.3.5 | 17.4.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Umbraco | Umbraco Cms | from 14.0.0 before 17.4.0 |