CVE-2026-36537
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk14th percentile - higher than 14% of all known CVEs
Summary
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.
Risk Assessment
An attacker can bypass authentication and gain full access to any existing user account on the platform, resulting in a complete account takeover.
Recommendation
It is recommended to update to the latest version of ThingsBoard and implement additional identity verification mechanisms for user data.
Other vulnerabilities in ThingsBoard v4.3.0.1
See all- CVE-2025-34282Critical
An SSRF vulnerability in the Image Upload Gallery feature of ThingsBoard versions prior to 4.2.1 allows an attacker to upload a malicious SVG file referencing a remote URL. Server processing may trigger unintended outbound requests.
- CVE-2026-53676High
ThingsBoard contains a prototype pollution vulnerability which may lead to arbitrary code execution within a sandboxed context by a user who can log in to the affected product with the tenant administrator privilege (TENANT_ADMIN).
- CVE-2026-9568Medium
In ThingsBoard up to version 4.3.1.1, a vulnerability in the getGatewayDockerComposeFile function of /api/v1/provision (YAML Handler component) allows code injection. Remote attack is possible but difficult.
- CVE-2022-45608High
An issue in ThingsBoard 3.4.1 allows low-privileged attackers (CUSTOMER_USER) to escalate privileges to administrator level (TENANT_ADMIN or SYS_ADMIN). The attack requires knowledge of the corresponding API parameter (authority: value).
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS