CVE-2026-46609: Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog

May 21, 2026 (updated June 10, 2026)

Authenticated users are able to inject HTML vulnerability into an input field, which is rendered in the confirmation dialog without proper output encoding.

References

github.com/advisories/GHSA-vr9v-27gg-qgx4
github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-vr9v-27gg-qgx4
nvd.nist.gov/vuln/detail/CVE-2026-46609

Code Behaviors & Features

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