They create accountability problems because identity creation is diffused across commits, modules, variables, and CI/CD triggers. No single log entry reliably captures the human owner, so the organisation cannot assume the creator, requester, and approver are the same. That makes lifecycle ownership a provenance question, not a deployment question.
Why IaC Diffuses Accountability for NHI Creation
Infrastructure as code turns identity creation into a distributed outcome of source changes, module composition, variable values, and pipeline execution. That is efficient for delivery, but it weakens the normal paper trail around who actually created, approved, or inherited the identity. The problem is not simply speed, it is that the provenance of the identity is often spread across several human decisions and automation steps.
When that happens, the organisation can no longer rely on a single event or ticket to explain ownership. A commit author may define the object, a reviewer may approve it, a CI/CD system may instantiate it, and an operator may later inherit it. The result is that accountability has to be reconstructed from evidence, not assumed from the deployment path.
That distinction matters because NHI ownership is a lifecycle control, not a one-time release event. A created identity should have a clear business owner, technical owner, and operational custodian, but IaC often makes those roles implicit unless they are deliberately encoded in policy and metadata.
Where Ownership Evidence Usually Breaks Down
In practice, accountability breaks when the organisation cannot reliably answer three questions: who requested the NHI, who accepted responsibility for it, and who can revoke or rotate it later. IaC can separate those answers across different repos, teams, and approval chains, especially when reusable modules abstract the identity away from the service that consumes it.
That is why ownership metadata has to travel with the code. If the repo only shows that a resource was declared, but not why it exists, which service depends on it, or which team must maintain it, the identity can become functionally ownerless even though it was created through a controlled pipeline.
NHIMG’s NHI Ownership and Accountability Guide is the most direct reference for turning ownership from an informal assumption into a recoverable control. For broader lifecycle context, the Top 10 NHI Issues shows how ownership gaps interact with inventory, offboarding, and access governance.
Why This Becomes a Governance Problem, Not Just a Delivery Pattern
Once an NHI is created by code, the real risk is not only that it exists, but that no single control point owns its continued legitimacy. That can leave long-lived credentials, excessive access, and orphaned identities in place after the original project, engineer, or pipeline intent has changed. In other words, the security issue is often a missing governance loop, not a broken deployment step.
The most useful way to think about it is provenance. If you cannot trace the identity back to a named request, an approver, and an accountable owner, then you do not have enough evidence to manage its lifecycle responsibly. IaC does not remove accountability, but it does force you to prove it through traceable artefacts rather than through memory or team convention.
For that reason, service-account and workload-identity controls matter even when the creation mechanism is automated. The Service Account Security Guide and the NHI Authentication Guide help connect creation-time decisions to ongoing credential and trust management, so the identity remains governable after deployment.
Risk and Threat Considerations
IaC-generated NHIs can become stealthy ownership gaps: they may be provisioned correctly, used successfully, and still remain impossible to attribute cleanly when they need review, rotation, or revocation. The exposure grows when reusable modules and automated triggers create many similar identities, because one missed ownership record can scale into a broad orphaning problem.
Failure mechanism: Identity creation is split across code authorship, pipeline execution, and runtime provisioning, so no single system records the accountable human owner with enough certainty to support lifecycle decisions.
Impact: The organisation may retain overprivileged, stale, or orphaned NHIs, and it may be unable to prove who should approve remediation, accept residual risk, or authorise decommissioning.
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 addresses the attack surface, NIST SP 800-53 Rev 5 sets the technical controls, and ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 — Improper Offboarding | IaC-created NHIs need clear ownership to support timely offboarding. |
| NHI-05 — Overprivileged NHI | Diffuse ownership often leaves created NHIs with unchecked permissions. | |
| NHI-07 — Long-Lived Secrets | Automated creation can leave secrets and credentials in place without accountable rotation. | |
| Recommendation — Tag every IaC-created NHI with an accountable owner before deployment. Review IaC-managed NHI permissions before release and remove excess access. Enforce rotation and expiry for secrets issued through IaC. | ||
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | IaC-generated NHIs rely on managed credentials that need lifecycle control. |
| AC-6 — Least Privilege | Ownership gaps commonly translate into excessive access on created NHIs. | |
| Recommendation — Manage issuance, rotation, and revocation of NHI authenticators centrally. Limit each IaC-created NHI to the minimum privileges it needs. | ||
| ISO/IEC 27001:2022 | A.5.18 — Access rights | Accountability for created NHIs depends on controlled assignment and review of access rights. |
| Recommendation — Assign and review NHI access rights through a documented ownership process. | ||
Practitioner Guidance
What to verify: Require every IaC-defined NHI to carry an explicit owner, purpose, and service dependency, and verify that the same fields appear in inventory, review, and incident workflows. If the identity cannot be mapped back to a named accountable team, treat that as a control gap, not an administrative detail.
Decision rule: If the NHI can authenticate to production or can later be used by another pipeline, insist on lifecycle ownership at creation time, not after first use. If the identity has no durable owner in code or metadata, block promotion until ownership is assigned and auditable.
Practitioner takeaway: IaC should automate provisioning, not accountability, so the control objective is to make ownership as explicit and persistent as the identity itself.