CVE-2026-111629 json
IoTSharp through 3.6.1 Cross-Tenant Data Exposure via Customers and Devices APIs
published 24d ago modified 19d ago also EUVD-2026-103051
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 24%
- public exploits
- 0
- none known
Summary
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.
Is CVE-2026-111629 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 19d ago
Exploit prediction
0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- hackmd.io https://hackmd.io/@hieuPenguinnn/iotsharp-devices-customers-cross-tenant-idor referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| CNA | 4.0 | 5.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- IoTSharp IoTSharp
Classification
- Weakness
-
- CWE-639 Authorization Bypass Through User-Controlled Key
References
-
hackmd.io
/@hieuPenguinnn/iotsharp-devices-customers-cross-tenant-idor
third-party-advisory, exploit
-
github.com
/IoTSharp/IoTSharp/blob/v3.6.1/IoTSharp/Controllers/CustomersController.cs#L164-L177
technical-description
-
github.com
/IoTSharp/IoTSharp/blob/v3.6.1/IoTSharp/Controllers/DevicesController.cs#L490-L507
technical-description
-
vulncheck.com
/advisories/iotsharp-through-3.6.1-cross-tenant-data-exposure-via-customers-and-devices-apis
third-party-advisory
Sources
- CVE List CVE-2026-111629
- NVD CVE-2026-111629
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.