Start with a single inventory of identities, entitlements, and connected applications across your cloud estate, then segment reviews by risk and identity type. Human users, shared accounts, and service accounts need different certification logic, because ownership, expiry, and remediation differ. The goal is not just approval, but provable removal of access that no longer matches business need.
Why This Matters for Security Teams
Cloud access reviews fail when they are treated as a quarterly admin exercise instead of an identity control tied to real operational risk. Across SaaS and multi-cloud estates, the review has to answer three different questions at once: who has access, why they have it, and whether that access is still justified by the current business process. That is especially important for service accounts, shared accounts, and application-to-application access, where ownership is often unclear and expiry is missing. The 2024 Non-Human Identity Security Report found that 35.6% of organisations cite consistent access across hybrid and multi-cloud environments as their top NHI security challenge, which explains why reviews often stall at inventory rather than remediation. The right model is closer to OWASP Non-Human Identity Top 10 guidance than to a generic audit checklist: enumerate identities, map entitlement owners, and prove removal, not just approval. In practice, many security teams discover excessive access only after an application migration, an SSO integration change, or a cloud incident has already exposed the gap.
How It Works in Practice
Effective reviews start with one authoritative inventory that merges SaaS users, cloud console principals, API clients, workload identities, and privileged roles. From there, certification logic should be segmented by identity type because a human user, a contractor, and a machine token do not age out the same way. Human access can usually be reviewed through manager and application-owner attestation; service accounts need technical ownership, dependency mapping, and a defined expiry or renewal process; shared accounts should be flagged for replacement because accountability is usually weak. This is where lifecycle discipline matters, and the NHI Lifecycle Management Guide is a useful reference for tying birth, use, rotation, and retirement together.
For cloud estates, the review should include effective permissions, not just assigned roles. That means looking through nested groups, inherited policies, federated access, standing admin grants, and dormant entitlements in SaaS apps. Teams that already use PAM or JIT should verify whether standing privilege is still hiding behind broad roles, and whether temporary elevation is actually expiring on schedule. Where access is tied to secrets, review whether tokens, API keys, and certificates are rotated fast enough to support revocation after a failed certification. The Ultimate Guide to NHIs and the 52 NHI Breaches Analysis both reinforce the same pattern: bad reviews are really bad revocation programs.
Current guidance suggests combining attestation with automated evidence, such as last-used timestamps, login source, policy drift, and ticket-linked business justification. That reduces review fatigue and makes the outcome defensible to auditors. These controls tend to break down in environments where SaaS provisioning is decentralized and cloud permissions are inherited through multiple layers of groups, roles, and platform templates because ownership and effective access become hard to prove.
Common Variations and Edge Cases
Tighter access review controls often increase operational overhead, so organisations have to balance assurance against the friction of chasing approvers, application owners, and platform teams. There is no universal standard for this yet, but best practice is evolving toward risk-based certification cycles rather than one-size-fits-all annual reviews. High-risk cloud admin roles, exposed secrets, and internet-facing SaaS integrations deserve shorter cycles than low-impact business apps.
Edge cases usually appear where access is indirect. A user may not hold an obvious admin role but still inherit effective privilege through group nesting, delegated OAuth consent, or a vendor integration. Likewise, a service account may look inactive while still being embedded in an automation job that only runs monthly or during incident response. That is why review evidence should include dependency checks, not just login history. The Snowflake breach and the Azure Key Vault privilege escalation exposure illustrate how exposed access paths and weak secrets governance can turn routine privilege into immediate blast radius. For cloud-heavy programmes, the OWASP Non-Human Identity Top 10 is a useful benchmark, but it should be adapted to the organisation's own approval model and revocation workflow. In practice, reviews fail most often when teams certify the person, not the effective access path.
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 Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Targets inventory and governance of non-human identities and their access paths. |
| NIST CSF 2.0 | PR.AC-4 | Covers access permissions, least privilege, and authorization management. |
| NIST Zero Trust (SP 800-207) | 3.1 | Supports continuous verification and least-privilege access decisions across cloud resources. |
Use zero trust principles to reassess cloud access continuously instead of relying on annual attestation alone.
Related resources from NHI Mgmt Group
- How should security teams implement segregation of duties in multi-cloud environments?
- How should security teams implement JIT access in multi-cloud environments?
- How should security teams govern workload identity across mixed cloud environments?
- How should security teams prioritise NHI remediation in cloud environments?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 4, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
