CVE-2026-53676: High severity ThingsBoard ThingsBoard vulnerability
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 (TENANTADMIN).
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Remove TENANT_ADMIN privileges from any accounts that do not require them and apply least-privilege: retain TENANT_ADMIN only for trusted personnel.
ThingsBoard TENANT_ADMIN role assignment = limited - Compensating control
Restrict access to ThingsBoard management/login interfaces to trusted networks or IPs (for example via firewall, VPN, or network ACLs) to reduce risk of exploitation by attackers who can obtain TENANT_ADMIN credentials.
- Operational
Audit all TENANT_ADMIN accounts, disable or remove unused accounts, and rotate credentials for remaining TENANT_ADMIN accounts.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-53676?
The severity of CVE-2026-53676 is rated as high with a score of 7.2.
What vulnerability does CVE-2026-53676 describe?
CVE-2026-53676 describes a prototype pollution vulnerability in ThingsBoard that may lead to arbitrary code execution.
Who is affected by CVE-2026-53676?
Users with tenant administrator privilege (TENANT_ADMIN) in ThingsBoard are affected by CVE-2026-53676.
How could CVE-2026-53676 be exploited?
CVE-2026-53676 could be exploited by a logged-in user with appropriate privileges executing arbitrary code within a sandboxed context.
How do I fix CVE-2026-53676?
To fix CVE-2026-53676, ensure you apply the latest security updates and patches provided by ThingsBoard.