They should treat the process as ineffective until it can produce verified removal. Access reviews that do not remove stale or excessive entitlements create a false sense of control, especially for privileged and non-human identities. The fix is to link certification workflows to enforced revocation and exception tracking.
Why This Matters for Security Teams
Access reviews only matter when they change the live entitlement set. If certifiers can approve or reject access but the underlying IAM, PAM, or cloud control plane does not enforce removal, the organisation has recorded a decision without reducing risk. That gap is especially dangerous for service accounts, API keys, and other NHIs, where stale access tends to persist quietly and is often missed until a breach review or audit failure exposes it. The OWASP Non-Human Identity Top 10 treats lifecycle and privilege control as core security issues, not admin hygiene.
NHI Management Group data reinforces the problem: only 20% of organisations report formal processes for offboarding and revoking API keys in the Ultimate Guide to NHIs, and 97% of NHIs carry excessive privileges. That combination makes “review only” governance a weak signal, because the real question is whether access changed, not whether someone signed off on a spreadsheet. In practice, many security teams discover revocation failures only after access has already been abused or an audit asks for proof of enforcement.
How It Works in Practice
The fix is to design access reviews as an enforcement workflow, not a reporting exercise. A certification should create a machine-readable decision that automatically triggers revocation, restriction, or exception handling in the authoritative system of record. For humans that may be an IAM or PAM platform; for NHIs it often includes secrets managers, cloud IAM, CI/CD service principals, token brokers, and workload identity systems. Guidance from the OWASP Non-Human Identity Top 10 and the NHI Management Group NHI Lifecycle Management Guide is consistent: if revocation is not technically enforced, the review has not completed.
Practical teams usually implement four controls:
- Link review findings to deterministic actions, such as deprovision, disable, rotate, or expire.
- Require exception records with expiry dates, an owner, and a compensating control.
- Reconcile certification outcomes against actual entitlements after the workflow completes.
- Alert on drift when removed access still functions in cloud, API, or pipeline systems.
For high-risk NHIs, especially privileged service accounts and automation tokens, current practice increasingly favors just-in-time or short-lived credentials so the default state is non-persistent access. That aligns better with modern zero trust patterns than static approvals that never translate into removal. NIST’s Zero Trust Architecture also supports continuous verification rather than one-time trust decisions. These controls tend to break down when access is federated across multiple cloud tenants and local application owners can override central revocation.
Common Variations and Edge Cases
Tighter revocation control often increases operational overhead, so organisations have to balance speed of remediation against the risk of breaking production workloads. That tradeoff is real for shared service accounts, legacy applications, and third-party integrations where immediate removal can halt critical jobs. In those cases, current guidance suggests using time-bound exceptions, compensating monitoring, and staged credential rotation rather than allowing open-ended access to survive a failed review.
There is no universal standard for every environment yet, but the direction is clear. If an application cannot tolerate direct revocation, teams should move it to a managed pattern such as short-lived tokens, workload identity, or brokered access with automated expiry. The 2024 Non-Human Identity Security Report from Aembit shows that 88.5% of organisations already recognise their NHI practices lag behind human IAM, which helps explain why review programs often stop at approval. The right response is to measure success by removed entitlements, not by completed attestations. Audit evidence should show the before state, the removal action, and the post-removal verification.
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 |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Review-only governance fails if NHI entitlements are not revoked. |
| NIST CSF 2.0 | PR.AC-4 | Access governance must reflect actual privilege enforcement, not approvals. |
| NIST AI RMF | Governance should ensure decisions translate into operational risk reduction. |
Use AI RMF governance to require accountable, measurable enforcement after every access review.
Related resources from NHI Mgmt Group
- How should security teams run access reviews for non-human identities?
- How should IAM teams respond when Office 365 identity sprawl spans human and non-human access?
- How should IAM teams reduce bottlenecks in access review campaigns?
- How should security teams govern access to sensitive data across IAM and data security tools?
