Umbraco: Delivery API leaks protected (Public Access) content through Content Picker / Multi-Node Tree Picker expansion

The Content Delivery API enforces member / Public Access protection only at the controller layer, against the node that is directly requested. When a public unprotected node references a protected node through a Content Picker or Multi-Node Tree Picker including those nested inside Block List,...

CVE-2026-69197 Umbraco: Delivery API leaks protected (Public Access) content through Content Picker / Multi-Node Tree Picker expansion

Umbraco is an ASP.NET CMS. Prior to 13.15.1, 17.5.3, and 18.0.2, the Content Delivery API applies member and Public Access checks to the directly requested node but not to referenced nodes serialized through Content Picker or Multi-Node Tree Picker properties, including pickers nested in Block...

CVE-2026-69197

Umbraco CMS (ASP.NET) contains an authorization bypass in the Content Delivery API prior to 13.15.1, 17.5.3, and 18.0.2 . Member and Public Access checks are applied to the directly requested node but not to referenced nodes serialized through Content Picker or Multi-Node Tree Picker properties, ...