Ownership should sit with the identity governance function, with input from application owners, security, and operations. IAM defines the baseline, PAM handles elevated access, and business owners validate what is genuinely required. If ownership is diffuse, broad access survives because no one is accountable for removing it.
Why This Matters for Security Teams
“just enough access” sounds straightforward until IAM, PAM, and application ownership overlap. If no single function owns the decision, teams tend to keep permissions broad to avoid blocking work, and standing access becomes the default. That is especially dangerous for service accounts, API keys, and automation identities, which often outnumber human accounts and are harder to review consistently. NHI Management Group notes that NHIs outnumber human identities by 25x to 50x in modern enterprises in its Ultimate Guide to NHIs.
The practical risk is not just over-permissioning. It is fragmented accountability: IAM defines baseline access, PAM governs elevation, and business owners know the operational need, but no one is explicitly accountable for making the final just enough access decision. That gap is where excessive privilege survives, especially when access reviews are treated as a compliance task instead of an active control. The OWASP Non-Human Identity Top 10 treats excessive or long-lived access as a core failure mode for NHI programs. In practice, many security teams discover this only after a service account or API key is already being used far beyond its intended purpose, rather than through intentional access design.
How It Works in Practice
The ownership model works best when identity governance holds the decision-making authority and IAM and PAM act as enforcing controls, not competing sources of truth. Identity governance should define who can approve access, what evidence is required, how often access is revalidated, and when escalation belongs in PAM instead of the baseline IAM role model. Business owners and application owners validate operational need, while security sets policy boundaries and operations confirms feasibility.
For non-human identities, that ownership must also account for workload identity, ephemeral credentials, and request-time context. Current guidance suggests that static RBAC alone is usually too blunt for autonomous or machine-driven access. In many environments, the better pattern is to issue short-lived credentials for a specific task, then revoke them automatically when the task completes. That reduces the blast radius if a secret is exposed and makes access reviews more meaningful because the question shifts from “who has permanent access?” to “who is allowed to mint access, under what conditions?”
In practice, the decision process often includes:
- baseline IAM roles for ordinary operations
- PAM elevation only for discrete administrative actions
- approval by the business owner for genuine need
- policy checks at request time using context, not only prebuilt role mappings
- time-bound access with automatic expiry and revocation
This approach aligns with emerging workload identity practices described by the SPIFFE project and with real-world NHI governance concerns documented in The 2024 Non-Human Identity Security Report, which found that 88.5% of organisations say NHI IAM practices lag behind or only match human IAM, and only 19.6% express strong confidence in securely managing workload identities. These controls tend to break down in multi-cloud environments where access paths, approval workflows, and secret stores differ enough that no one team can consistently enforce the same decision standard.
Common Variations and Edge Cases
Tighter ownership often increases approval overhead, so organisations must balance faster delivery against reduced privilege creep. That tradeoff is real, especially when platform teams want self-service access and app teams need rapid deployment changes. Best practice is evolving, but there is no universal standard for this yet: some organisations centralise all just enough access decisions in identity governance, while others delegate recommendation authority to app owners and keep final enforcement with security.
The edge cases are usually the ones that cause the most trouble. Break-glass accounts, machine-to-machine integrations, and vendor-managed automations often fall outside normal approval paths, which means they need explicit ownership rules and expiry requirements. PAM should still control elevation, but it should not become the place where long-lived exceptions quietly accumulate. The Ultimate Guide to NHIs — Key Challenges and Risks is especially relevant here because excessive privileges and weak offboarding are recurring causes of exposure.
The cleanest operating model is to separate policy ownership from technical enforcement: identity governance owns the decision, business owners own the justification, and IAM/PAM teams own the implementation. Where that separation is missing, access reviews devolve into rubber-stamping, and broad permissions remain in place because no single function is accountable for removing them.
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 AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-03 | Addresses excessive and long-lived NHI access decisions. |
| CSA MAESTRO | Covers governance for agentic and workload access ownership. | |
| NIST AI RMF | Supports accountable governance for dynamic AI and automated access. |
Assign runtime access decision authority to a governed identity function with clear approval boundaries.
