CVE-2026-36537 Auth bypass in n/a
Remote attackers can bypass OAuth authentication by manipulating user identity data to take over any existing account on the ThingsBoard platform.
- 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-2026-36537?
CVE-2026-36537 is a critical authentication bypass vulnerability in n/a, published on 15 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-290
Which versions are affected by CVE-2026-36537?
How do I fix CVE-2026-36537?
No fix has been published for CVE-2026-36537 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-36537 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-36537 exists.
Sources
Also known as GHSA-cjqr-jj24-mfr6.