CVE-2026-111654

FastBee through 2.1.0 contains an insecure direct object reference vulnerability that allows authenticated low-privilege users to access other users' device groups because GroupController queries lack owner checks. Attackers, including self-registered users, can supply sequential group IDs to read, overwrite, reassign, rewrite device associations of, or delete other users' groups.

CVSS v3 6.3 MEDIUM

6.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-open-api/src/main/java/com/fastbee/data/controller/GroupController.java#L70-L137
https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-service/fastbee-iot-service/src/main/java/com/fastbee/iot/service/impl/GroupServiceImpl.java#L37-L143
https://github.com/kerwincui/FastBee/blob/v2.1.0/springboot/fastbee-service/fastbee-iot-service/src/main/resources/mapper/iot/GroupMapper.xml#L36-L109
https://hackmd.io/@hieuPenguinnn/fastbee-device-group-cross-user-idor
https://www.vulncheck.com/advisories/fastbee-through-2.1.0-idor-via-iot-group-by-id-endpoints
https://hackmd.io/@hieuPenguinnn/fastbee-device-group-cross-user-idor

Configurations

No configuration.

History

21 Oct 2026, 21:17

Type	Values Removed	Values Added
References	~~() https://hackmd.io/@hieuPenguinnn/fastbee-device-group-cross-user-idor -~~	() https://hackmd.io/@hieuPenguinnn/fastbee-device-group-cross-user-idor -

16 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 18:17

Updated : 2026-10-21 21:17

NVD link : CVE-2026-111654

Mitre link : CVE-2026-111654

CVE.ORG link : CVE-2026-111654

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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