ThingsBoard v4.3.0.1 is vulnerable to an authentication bypass during the OAuth authorization code exchange. The application improperly trusts user-supplied identity data within the user parameter of the /login/oauth2/code/ endpoint. By manipulating the email address in this JSON object, a remote attacker can bypass authentication and gain full access to any existing user account on the platform without possessing the target user's credentials. This results in a complete account takeover.
History

Thu, 18 Jun 2026 04:45:00 +0000

Type Values Removed Values Added
Title ThingsBoard OAuth 2.0 Authentication Bypass and Account Takeover

Tue, 16 Jun 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-290
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Tue, 16 Jun 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Thingsboard
Thingsboard thingsboard
Vendors & Products Thingsboard
Thingsboard thingsboard

Mon, 15 Jun 2026 19:30:00 +0000

Type Values Removed Values Added
Description ThingsBoard v4.3.0.1 is vulnerable to an authentication bypass during the OAuth authorization code exchange. The application improperly trusts user-supplied identity data within the user parameter of the /login/oauth2/code/ endpoint. By manipulating the email address in this JSON object, a remote attacker can bypass authentication and gain full access to any existing user account on the platform without possessing the target user's credentials. This results in a complete account takeover.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-06-15T00:00:00.000Z

Updated: 2026-06-16T13:19:13.554Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-36537

cve-icon Vulnrichment

Updated: 2026-06-16T13:18:37.563Z

cve-icon NVD

Status : Deferred

Published: 2026-06-15T20:16:25.907

Modified: 2026-06-16T15:51:29.037

Link: CVE-2026-36537

cve-icon Redhat

No data.