CVE-2026-46609

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

Published Jun 10, 2026 CVSS 3.1 · 4.6 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-vr9v-27gg-qgx4 Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog
History
Type Values Removed Values Added
First Time appeared Umbraco umbraco Cms
CPEs cpe:2.3:a:umbraco:umbraco_cms:*:*:*:*:*:*:*:*
Vendors & Products Umbraco umbraco Cms
Type Values Removed Values Added
First Time appeared Umbraco
Umbraco cms
Vendors & Products Umbraco
Umbraco cms
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Umbraco.Cms: XSS/HTML Injection in Umbraco Backoffice confirmation dialog
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 4.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jun 10, 2026, 6:08 PM
Reserved
May 15, 2026, 7:34 PM
Status
Analyzed
Published
Jun 10, 2026, 5:16 PM
Modified
Oct 26, 2026, 11:10 AM