Because a limited app permission can become a route to tenant-wide change once a human activation step unlocks a privileged group. The risk is the combined control path, not the individual permission. IAM teams need to review those combinations as a single escalation chain.
Why This Matters for Security Teams
App permissions often look harmless in isolation, but they become dangerous when they can be activated through a privileged human workflow. A limited OAuth grant, delegated admin scope, or directory app role can suddenly inherit the blast radius of a PIM-eligible role once a person elevates. That creates an escalation chain that is easy to miss in entitlement reviews because the risk spans both machine access and human activation.
NHI Mgmt Group notes that 97% of NHIs carry excessive privileges, which is why this pattern is so common in real environments. The issue is not just least privilege on the app side; it is the combined path from application permission to privileged operation. Current guidance from the OWASP Non-Human Identity Top 10 aligns with treating these identities as active attack paths, not passive configuration records. Security teams that only review app scopes or only review PIM roles will miss the compound exposure.
Ultimate Guide to NHIs — Key Challenges and Risks is useful here because it frames excessive privilege, visibility gaps, and secret exposure as linked governance problems rather than separate tickets. In practice, many security teams encounter this only after an app is used to accelerate a privilege change or automate a tenant-wide action, rather than through intentional access design.
How It Works in Practice
The dangerous part is the control chain. A service principal, app registration, or automation identity may only have a narrow permission such as reading group membership, assigning roles, or triggering a workflow. If a human operator can later activate a PIM-eligible role, that same app can be used inside the elevated window to perform actions that would otherwise be blocked. The app did not become stronger by itself. It became stronger because the surrounding human control temporarily raised the ceiling.
Operationally, teams should review three layers together: the app permission, the PIM role it can reach indirectly, and the business path that ties them together. The OWASP Non-Human Identity Top 10 is a useful reference for modelling these chained risks, while Ultimate Guide to NHIs — Key Challenges and Risks supports the practical view that visibility and rotation alone do not solve privilege composition.
- Map every app permission that can influence identity, role, or group state.
- Identify which of those actions become materially more powerful during PIM activation windows.
- Check whether the app can be used by automation, not just by an administrator sitting at a console.
- Require logging that links the app action, the human elevation event, and the downstream change.
Where possible, evaluate access as a single path rather than as separate entitlements. This is especially important when roles allow nested group assignment, privileged directory writes, or delegated consent. These controls tend to break down when an organisation assumes PIM is a human-only safeguard, because the app can still drive the privileged workflow once the human gate opens.
Common Variations and Edge Cases
Tighter permission review often increases operational friction, requiring organisations to balance fast automation against safer privilege composition. That tradeoff is real, especially in environments that rely on delegated admin, CI/CD service identities, or approval-based IT workflows.
One common edge case is a low-scope app that can only prepare a change, while the PIM role performs the final action. Guidance is still evolving on whether that should be treated as direct privilege or indirect privilege, but current best practice is to treat it as a single escalation chain whenever the two controls reliably work together. Another case is temporary access for incident response, where teams may accept broader app-to-role coupling for speed. Even there, time-bounded approval and full audit linkage are essential.
In hybrid identity environments, the same pattern can cross directory, cloud, and SaaS boundaries, making manual review brittle. IAM teams should pay special attention to any app that can write groups, grant consent, alter role assignments, or call privileged APIs during elevation windows. The OWASP Non-Human Identity Top 10 and the NHIMG guide both reinforce the same operational lesson: treat combined paths as attack surfaces, not just permissions lists.
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-01 | Covers excessive permissions that become risky when chained to PIM elevation. |
| NIST CSF 2.0 | PR.AC-4 | Addresses access authorisation and privilege management across combined identity paths. |
| NIST AI RMF | Supports governance of autonomous and dynamic access decisions in complex identity chains. |
Use AI RMF-style governance to document ownership, monitoring, and escalation handling for privileged workflows.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 24, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
