CVE-2026-71262 IoTSharp BlobStorageController Missing Authentication and Path Traversal
Unauthenticated attackers can access BlobStorageController endpoints to upload, download, list, modify, or delete files due to missing authorization checks.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-71262?
CVE-2026-71262 is a critical missing authorization vulnerability in IoTSharp, published on 5 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-71262?
How do I fix CVE-2026-71262?
No fix has been published for CVE-2026-71262 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-71262 being exploited?
There is no known exploitation of CVE-2026-71262 in the wild and no public exploit code.
Sources
Also known as GHSA-p2pj-7344-wr5m.