CRE-2025-0045
NATS Authorization Failure DetectedMediumImpact: 4/10Mitigation: 4/10
Description
The NATS server has emitted an **Authorization Violation** log entry, meaning a client attempted to connect, publish, subscribe, or perform another operation for which it lacks permission. Intermittent violations often point to misconfiguration or start-up chaos. However, sustained or widespread violations can signal credential expiry or missing secrets.\n
Mitigation
- **Verify credentials** – confirm the `.creds`, NKey, or JWT files in\n the client deployment are correct and unexpired. \n- **Check permissions** – in the server configuration (`authorization {}`) \n or the account JWT, ensure the user/account is allowed to perform the\n attempted PUB/SUB/CONNECT operation. \n- **Rotate or re-issue keys/JWTs** if credentials are compromised or\n expired, and update all clients. \n- **Synchronize clocks** on clients and servers via NTP to avoid JWT\n time-skew errors. \n- **Audit repeated failures** – turn on verbose server logs temporarily\n and review for malicious activity or configuration drift. \n