CVE-2026-46609

Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog

CVSS 4.6 MEDIUMEPSS 0.1%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.6EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

10 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N

Affected products

umbraco · Umbraco-CMS

Want to know if your infrastructure is exposed to this?

Talk to TrueHacking →

References

https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-vr9v-27gg-qgx4