CVE-2026-50194

### Summary When Steeltoe management endpoints are configured to listen on an alternate port (`Management:Endpoints:Port` is configured), the middleware responsible for restricting access to the endpoints uses the `Host` HTTP header rather than the actual network socket port. ### Impact An unauthenticated remote attacker can reach every actuator endpoint using a specially crafted HTTP request. ### Affected configuration - The application's public port is accessible over from the network. - `Management:Endpoints:Port` is configured to a value different from the application's main listener port. - The request scheme matches `Management:Endpoints:SslEnabled`. For example, `http` when `SslEnabled` is `false` (the default), or `https` when `SslEnabled` is `true`. ### Mitigations If an immediate upgrade to a patched version is not possible: - Add explicit ASP.NET Core authorization (`RequireAuthorization`) to all sensitive actuator endpoints as a defense-in-depth measure independent of port isolation. - Configure the reverse proxy or load balancer to enforce the `Host` header value and prevent clients from setting an arbitrary port.