CVE-2026-111629 IoTSharp through 3.6.1 Cross-Tenant Data Exposure via Customers and Devices APIs
Authenticated users can access other tenants' customer and device data due to missing tenant scoping in API handlers.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111629?
CVE-2026-111629 is a medium-severity missing authorization vulnerability in IoTSharp, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IoTSharp through 3.6.1 contains an insecure direct object reference vulnerability that allows any authenticated user to read other tenants' data because Customers and Devices API handlers do not scope queries to the caller's tenant. Attackers can self-register through the anonymous AccountController.Create endpoint and supply other tenants' GUIDs to read customer contact details, device inventories and device attribute telemetry.
Weakness: CWE-639
Which versions are affected by CVE-2026-111629?
How do I fix CVE-2026-111629?
No fix has been published for CVE-2026-111629 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-2026-111629 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111629 exists.
Sources
Also known as GHSA-42g8-wcwc-865r.