Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks. The issue is caused by insufficient authorization enforcement on the affected API endpoint, whereby via an API call, domains can be set on content nodes that the editor does not have permission to access (either via user group privileges or start nodes). This vulnerability is fixed in 16.5.1 and 17.2.2.
History

Wed, 11 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 11 Mar 2026 12:00:00 +0000

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

Tue, 10 Mar 2026 22:00:00 +0000

Type Values Removed Values Added
Description Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks. The issue is caused by insufficient authorization enforcement on the affected API endpoint, whereby via an API call, domains can be set on content nodes that the editor does not have permission to access (either via user group privileges or start nodes). This vulnerability is fixed in 16.5.1 and 17.2.2.
Title Umbraco Backoffice API Allows Unauthorized Modification of Domain Data
Weaknesses CWE-639
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-10T21:49:54.908Z

Updated: 2026-03-11T15:58:54.874Z

Reserved: 2026-03-09T17:41:56.077Z

Link: CVE-2026-31832

cve-icon Vulnrichment

Updated: 2026-03-11T15:51:49.053Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-10T22:16:21.257

Modified: 2026-03-11T13:52:47.683

Link: CVE-2026-31832

cve-icon Redhat

No data.