CVE-2026-36537

Name: CVE-2026-36537
Creator: NVD / NIST
Published: 2026-06-15T20:16:25.907+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.51%

Last modified Jun 17, 2026

CVE-2026-36537 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.51%

39.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-290

References

Timeline

Published: Jun 15, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-36537?

How severe is CVE-2026-36537?

CVE-2026-36537 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.51% probability of exploitation in the next 30 days.

How do I fix CVE-2026-36537?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-36537?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST