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. The path/filename parameters passed to these endpoints (e.g. `_blob.WriteFileAsync($"{path}/{formFile.FileName}", ...)`) are used without sanitization, enabling path traversal that allows writing, reading, modifying, and deleting arbitrary files outside the intended blob storage directory, including web-accessible paths that can be leveraged for remote code execution via webshell upload.
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Fixes
Solution
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References
History
Fri, 07 Aug 2026 10:30:00 +0000
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Iotsharp
Iotsharp iotsharp |
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Iotsharp
Iotsharp iotsharp |
Wed, 05 Aug 2026 16:30:00 +0000
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ssvc
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Wed, 05 Aug 2026 13:15:00 +0000
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| Description | IoTSharp BlobStorageController.cs lacks the [Authorize] attribute applied to every other controller in the application (DevicesController, CustomersController, TenantsController, etc.), and no global authorization FallbackPolicy is configured in Startup.cs, leaving its Upload/Download/List/Modify/Delete endpoints reachable by unauthenticated remote attackers. The path/filename parameters passed to these endpoints (e.g. `_blob.WriteFileAsync($"{path}/{formFile.FileName}", ...)`) are used without sanitization, enabling path traversal that allows writing, reading, modifying, and deleting arbitrary files outside the intended blob storage directory, including web-accessible paths that can be leveraged for remote code execution via webshell upload. | |
| Title | IoTSharp BlobStorageController Missing Authentication and Path Traversal | |
| Weaknesses | CWE-306 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: TuranSec
Published:
Updated: 2026-08-05T15:38:42.279Z
Reserved: 2026-08-05T12:23:34.966Z
Link: CVE-2026-71262
Updated: 2026-08-05T15:38:38.730Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-08-07T10:07:02Z
Weaknesses