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.

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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
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 10 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Umbraco
Umbraco cms
Vendors & Products Umbraco
Umbraco cms

Wed, 10 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 10 Jun 2026 17:00:00 +0000

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-10T18:08:11.096Z

Reserved: 2026-05-15T19:34:14.011Z

Link: CVE-2026-46609

cve-icon Vulnrichment

Updated: 2026-06-10T18:08:07.131Z

cve-icon NVD

Status : Received

Published: 2026-06-10T17:16:37.123

Modified: 2026-06-10T17:16:37.123

Link: CVE-2026-46609

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-10T18:30:36Z

Weaknesses