CVE-2026-46609
Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog
4.6
MEDIUM
CVSS 3.1
Description
### Impact Authenticated users are able to inject HTML vulnerability into an input field, which is rendered in the confirmation dialog without proper output encoding. ### Patches This issue has been patched in 17.4.0
How to fix CVE-2026-46609
To remediate CVE-2026-46609, upgrade the affected package to a fixed version below.
- NuGet/Umbraco.Cms—upgrade to 17.4.0 or later
Is CVE-2026-46609 being exploited?
No exploitation signal available. Neither CISA KEV nor a current EPSS score has been published for CVE-2026-46609.
Affected packages (1)
- >= 14.0.0, < 17.4.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.6 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N |