CVE-2026-71262

CRITICAL 9.8

IoTSharp BlobStorageController Missing Authentication and Path Traversal

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-306
Vendor	iotsharp
Product	iotsharp
Published	Aug 5, 2026
Last Updated	Aug 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

IoTSharp / IoTSharp

0 ≤ *

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/IoTSharp/IoTSharp github.com: https://github.com/IoTSharp/IoTSharp/blob/master/IoTSharp/Controllers/BlobStorageController.cs

Credits

Alibek Baxtiyorov