What do teams get wrong when they merge NHI and human access reviews?

Why This Matters for Security Teams

Teams get into trouble when they treat non-human access reviews like a scaled-up version of human certification. Human reviews focus on job role, manager approval, and periodic attestation. NHI reviews need to account for code, pipelines, service accounts, tokens, certificates, and runtime grants that can exist outside normal IAM workflows. When those realities are merged, the review may look complete while missing the actual control points.

That mismatch is not theoretical. NHIMG research on the 2024 Non-Human Identity Security Report found that 88.5% of organisations say their non-human IAM practices lag behind or are only on par with human IAM. That gap matters because access review evidence often comes from the wrong system of record. If reviewers only inspect ticketing records, manager approvals, or HR-linked recertification, they can miss workload identities that are created in code, inherited through CI/CD, or granted dynamically at runtime. Current guidance from the OWASP Non-Human Identity Top 10 is clear that NHI risk is driven by lifecycle and secret handling, not just entitlement lists.

In practice, many security teams encounter overexposure only after a pipeline or service account has already been reused across multiple systems, rather than through intentional review design.

How It Works in Practice

Effective reviews separate human identity governance from workload identity governance, even if they are coordinated in the same program. A human reviewer can confirm whether an employee still needs access to a finance app. A workload review needs to ask where the identity lives, how it authenticates, what it can reach, whether the secret is static or ephemeral, and whether the access is still required by the application path.

For agents, automation, and service workloads, the practical approach is to review the identity as code and the access as runtime state. That usually means checking repository permissions, deployment manifests, secret stores, vault policies, token TTLs, and service-to-service trust relationships. It also means validating whether the workload identity is bound to a specific task or whether it can be reused broadly. The Ultimate Guide to NHIs — Key Challenges and Risks is useful here because it frames the lifecycle problems that show up when NHI access is treated as a human approval exercise.

• Review where the NHI is created: IAM, CI/CD, Kubernetes, cloud control plane, or application code.
• Check whether credentials are long-lived, duplicated, or shared across workloads.
• Confirm whether access can be reconstituted from current configuration, not just historical tickets.
• Verify that revocation happens when the workload is retired, replaced, or redeployed.

For control design, practitioners increasingly align to the NIST AI Risk Management Framework when autonomous systems are involved, because runtime behavior matters more than static entitlement approval. Reviews should also reflect the guidance in Top 10 NHI Issues, especially where secrets sprawl and unmanaged lifecycle states create hidden access paths. These controls tend to break down when workloads are rebuilt automatically across multiple environments because the review evidence lags behind the actual identity state.

Common Variations and Edge Cases

Tighter review scope often increases operational overhead, requiring organisations to balance better assurance against slower change and more evidence collection. That tradeoff is real, especially in cloud-native environments where identities are short-lived and access is distributed across several control planes.

There is no universal standard for this yet, but current guidance suggests avoiding one-size-fits-all recertification cadences. A human manager does not understand why a service account exists in a deployment pipeline, and a platform owner may not see the business context behind a human entitlement. The review model has to match the identity class. For example, ephemeral credentials should be checked by TTL and task binding, while long-lived secrets should be checked for storage location, rotation age, and blast radius. The NHI Lifecycle Management Guide is relevant because lifecycle control is often the missing layer in merged reviews.

This becomes especially tricky in multi-cloud and agentic environments, where one logical workload may fan out into several identities, each with different scopes and revocation paths. In those cases, the review must follow the execution path, not just the named account. Best practice is evolving toward context-aware review triggers, but there is still no universal standard for how frequently autonomous or delegated identities should be re-certified. Review programs that ignore this typically end up certifying paperwork, not access.

Related resources from NHI Mgmt Group

• What do security teams get wrong when they think access management is enough?
• How should security teams run access reviews for non-human identities?
• What do security teams get wrong about non-employee access governance in healthcare?
• What do identity teams get wrong about secure access?