{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-71262", "assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "state": "PUBLISHED", "assignerShortName": "TuranSec", "dateReserved": "2026-08-05T12:23:34.966Z", "datePublished": "2026-08-05T12:26:10.549Z", "dateUpdated": "2026-08-05T12:26:10.549Z"}, "containers": {"cna": {"title": "IoTSharp BlobStorageController Missing Authentication and Path Traversal", "descriptions": [{"lang": "en", "value": "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-306", "cweId": "CWE-306", "type": "CWE"}]}], "affected": [{"vendor": "IoTSharp", "product": "IoTSharp", "programFiles": ["IoTSharp/Controllers/BlobStorageController.cs"], "versions": [{"version": "0", "lessThanOrEqual": "*", "status": "affected", "versionType": "custom"}], "defaultStatus": "unaffected"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}}], "references": [{"url": "https://github.com/IoTSharp/IoTSharp"}, {"url": "https://github.com/IoTSharp/IoTSharp/blob/master/IoTSharp/Controllers/BlobStorageController.cs"}], "credits": [{"lang": "en", "value": "Alibek Baxtiyorov", "type": "finder"}], "providerMetadata": {"orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "shortName": "TuranSec", "dateUpdated": "2026-08-05T12:26:10.549Z"}}}}

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