Juin 2026

microsoft OpenAPI.NET

The OpenAPI.NET SDK contains a useful object model for OpenAPI documents in .NET along with common serializers to extract raw OpenAPI JSON and YAML documents from the model. From 2.0.0-preview11 until 2.7.5 and 3.5.4, a small OpenAPI document containing a circular schema reference can cause process termination through stack overflow in Microsoft.OpenApi. The issue affects OpenAPI document parsing through public OpenAPI.NET reader APIs and has been confirmed across both JSON and YAML reader paths. This vulnerability is fixed in 2.7.5 and 3.5.4.

HCLSoftware Traveler for Microsoft Outlook · Hcltech traveler for microsoft outlook

HCL Traveler for Microsoft Outlook (HTMO) is susceptible to vulnerabilities due to .NET Framework 4.5 being out of service.  Since .NET Framework 4.5 has reached end-of-life and no longer receives security updates, it may expose the application to publicly known security weaknesses through vulnerable third-party components.

Microsoft .NET 10.0 · Microsoft .NET 8.0 · Microsoft .NET 9.0 · Microsoft ASP.NET Core 10.0

Uncontrolled resource consumption in ASP.NET Core allows an unauthorized attacker to deny service over a network.

Microsoft .NET 10.0 · Microsoft .NET 8.0 · Microsoft .NET 9.0 · Red Hat Enterprise Linux 10

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.