Accountability should sit with the application or service owner, supported by the IAM and security teams that enforce lifecycle controls. If machine access persists, that is usually a governance failure, not a tool failure. Frameworks such as the NIST Cybersecurity Framework 2.0 expect clear ownership, review, and recovery responsibilities.
Why This Matters for Security Teams
When machine access outlives the business need, the problem is not simply unused credentials. It is an ownership gap that lets service accounts, API keys, and automation tokens remain active after the process they support has changed or ended. That creates standing access, hidden privilege, and audit blind spots that no access review can fix after the fact. The issue shows up often in environments where ownership is split between platform, application, and IAM teams, yet nobody is explicitly responsible for revocation.
This is why lifecycle governance matters as much as authentication. NHI Management Group’s Ultimate Guide to NHIs notes that only 20% of organisations have formal processes for offboarding and revoking API keys, which helps explain why stale machine access persists long after use should have ended. The OWASP Non-Human Identity Top 10 also treats weak lifecycle management as a core identity risk, not a side effect. In practice, many security teams encounter this only after an incident review or a failed vendor decommission, rather than through intentional access retirement.
How It Works in Practice
Accountability should be assigned to the application or service owner because that role owns the business process, the dependency chain, and the decision to keep or retire access. IAM and security teams enforce the guardrails, but they cannot know when a workload, integration, or partner path is no longer needed unless the owner declares it. That is why current guidance suggests treating machine access as part of the application lifecycle, not as a one-time provisioning event.
Operationally, the best model is a clear join between ownership and control:
- Every service account, API key, and automation token has a named owner and an expiry or review date.
- Decommissioning the application triggers revocation of related machine access, not just removal from documentation.
- IAM teams enforce JIT or short-lived credentials where possible, so access ends automatically when the task ends.
- Security teams verify that secrets, certificates, and tokens are not left behind in code, pipelines, or vault exceptions.
This aligns with the lifecycle and visibility priorities in Ultimate Guide to NHIs | Key Challenges and Risks, where stale credentials and poor visibility are recurring failure points. It also fits the broader identity governance direction in the OWASP Non-Human Identity Top 10, which emphasises rotation, ownership, and revocation as baseline controls. The practical standard is to make revocation part of the change record, the offboarding workflow, and the access review evidence. These controls tend to break down in fast-moving CI/CD environments because ownership changes faster than the entitlement inventory.
Common Variations and Edge Cases
Tighter lifecycle control often increases operational overhead, requiring organisations to balance faster delivery against stronger revocation discipline. That tradeoff becomes visible in shared platforms, third-party integrations, and long-lived automations where multiple teams depend on the same machine identity. There is no universal standard for every edge case, but current guidance suggests that shared access must still have a single accountable owner, even if several teams consume it.
One common exception is vendor-managed or platform-managed access. In those cases, accountability still sits with the internal service owner, but the revocation workflow may need coordination with procurement, vendor management, or platform operations. Another edge case is disaster recovery or break-glass automation, where access may persist intentionally for resilience. Even then, the owner should define an expiry, a compensating control, and a review cadence. NHI Management Group’s 52 NHI Breaches Analysis shows how often neglected machine identities become incident paths, which is why exception handling must be explicit rather than implied.
In mature programs, accountability is not just a named role. It is evidence that the owner can prove when access was approved, why it still exists, and what event will remove it. Without that, machine access tends to become permanent by default.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | PR.AC-1 | Ownership and access lifecycle accountability map directly to identity and access management. |
| OWASP Non-Human Identity Top 10 | NHI-03 | Stale machine access is a credential lifecycle failure, not just an IAM configuration issue. |
| NIST AI RMF | AI RMF governance supports clear accountability for autonomous machine access decisions. |
Assign each machine identity to a service owner and require documented approval, review, and revocation.
Related resources from NHI Mgmt Group
- Who is accountable when access remains after the business need ends?
- Who is accountable when access remains in place after it should have been removed?
- Who is accountable for third-party access after a campaign or project ends?
- Who is accountable when a third-party integration keeps an NHI active after the business need ends?
