Reviewers end up certifying access without a reliable view of which applications are active, who owns them, or whether the entitlement is still used. That disconnect weakens review quality and makes privilege creep harder to spot. In practice, the review becomes a checkbox exercise rather than a governance control.
Why This Matters for Security Teams
Access reviews lose value when reviewers are certifying entitlements against an incomplete SaaS inventory. If the organisation cannot see which applications are active, who owns them, or whether an entitlement is still exercised, the review process cannot reliably detect privilege creep, orphaned access, or shadow applications. That gap is especially dangerous for service accounts, API keys, and other non-human identities that often outlive the business process that created them.
This is not just a tooling issue. It is a governance failure caused by separating identity review from application visibility. Current guidance in the OWASP Non-Human Identity Top 10 aligns with the NHIMG view that visibility is foundational: if the asset is unknown, the entitlement cannot be meaningfully attested. NHIMG’s Ultimate Guide to NHIs notes that only 5.7% of organisations have full visibility into their service accounts, which explains why review campaigns often produce false confidence instead of risk reduction.
In practice, many security teams encounter excessive access only after a SaaS app has already become business-critical and no one can confidently say who approved it.
How It Works in Practice
Effective access review depends on tying three datasets together at the same time: the SaaS application inventory, the entitlement catalog, and the ownership record. When those are disconnected, reviewers are forced to make judgment calls on stale data. A cleaner model is to build the review queue from a current SaaS discovery source, enrich each application with business owner and technical owner fields, and then reconcile user and machine entitlements against recent usage signals before certification begins.
That workflow is stronger when governance teams treat visibility as a control input, not a reporting output. The NHIMG NHI Lifecycle Management Guide and the Top 10 NHI Issues both reinforce a simple operational point: lifecycle state, ownership, and usage context must be known before access can be reviewed meaningfully. For broader identity governance, the same logic appears in zero trust and access governance guidance from the OWASP Non-Human Identity Top 10.
- Start with a continuously updated SaaS inventory, not a static annual spreadsheet.
- Attach each app to a named owner and a reviewable business purpose.
- Separate human access, service accounts, and API tokens so reviewers do not conflate them.
- Use recent activity and last-used timestamps to flag dormant entitlements.
- Escalate unknown, ownerless, or unclassified apps as exceptions before certification.
The practical result is a review that can remove unused access instead of merely confirming it. These controls tend to break down in federated SaaS environments with weak discovery, because app ownership and usage telemetry are fragmented across admins, tenants, and automation pipelines.
Common Variations and Edge Cases
Tighter saas visibility often increases operational overhead, requiring organisations to balance review quality against data collection and catalog maintenance effort. That tradeoff becomes more pronounced in mergers, decentralized business units, and fast-moving SaaS sprawl, where the inventory changes faster than governance teams can refresh it.
There is no universal standard for this yet, but current guidance suggests that ownerless applications should not be approved through the same workflow as well-governed systems. Shadow IT, contractor-managed tools, and admin-created apps need separate handling because their ownership chains are weaker and their entitlements are more likely to drift. The same concern shows up in breach analysis such as the NHIMG 52 NHI Breaches Analysis, where control failures often begin with poor asset awareness rather than a sophisticated exploit.
For high-risk SaaS, best practice is evolving toward risk-based review cadences, shorter certification windows, and automated removal for stale access where business owners do not respond. That approach is more defensible than a broad quarterly attestation, but it only works when discovery is current and ownership is trusted. When SaaS visibility is partial, access reviews degrade fastest in environments with high automation and many dormant integrations, because the organisation cannot distinguish legitimate machine use from abandoned privilege.
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 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Requires visibility into non-human identities before review and governance decisions. |
| NIST CSF 2.0 | PR.AC-1 | Access permissions need asset context to support meaningful least-privilege reviews. |
| CSA MAESTRO | Agent and SaaS governance both depend on runtime context and ownership clarity. |
Apply context-aware governance so reviews use current ownership, usage, and risk signals.
Related resources from NHI Mgmt Group
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Reviewed and updated by the NHIMG editorial team on June 11, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
