What’s Vulnerable › Vulnerabilities

CVE-2026-36537

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-15 · updated 2026-06-17
• Weakness: CWE-290

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

• https://gist.github.com/KKC73/b9d4efda05693882f1e613c0e0fac78d
• https://gist.github.com/KKC73/b9d4efda05693882f1e613c0e0fac78d

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