A token expired mid-request. The API call failed. The logs show the non-human identity never refreshed its session. Critical operations stopped. This is why session timeout enforcement for non-human identities is not optional.
Non-human identities—API keys, service accounts, machine users—operate without human oversight. They hold privileges equal to or greater than human users. Without strict session timeout policies, these credentials can remain active far past their intended lifespan. Attackers rely on this kind of weakness.
Effective enforcement begins with defining short, non-negotiable timeout intervals. Every session for a non-human identity should expire automatically. No silent renewals. No invisible extensions. Automatic termination and re-authentication stop stale sessions from being reused.
The implementation must be consistent across all systems. Centralized session management makes tracking and enforcement possible. Use cryptographically signed tokens with embedded expiration claims. Reject all tokens past their defined timeout. Monitor in real time for sessions nearing expiry.