CVE-2026-71262: Iotsharp

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

IoTSharp BlobStorageController.cs lacks the [Authorize] attribute applied to every other controller in the application (DevicesController, CustomersController, TenantsController, etc.), and no global authorization FallbackPolicy is configured in Startup.cs, leaving its Upload/Download/List/Modify/Delete endpoints reachable by unauthenticated remote attackers.

Affected products

• Iotsharp Iotsharp: any version

Published 2026-08-05. Last modified 2026-08-26.