Who is accountable for enforcing least privilege when zero trust and access orchestration are used together?

Accountability should sit with the teams that own the resource and the policy, not only with network security. Zero trust teams typically govern connectivity, while identity and application owners govern entitlement to the underlying resource. Clear ownership, approval paths, and periodic review are necessary so no access layer becomes a blind spot.

Why This Matters for Security Teams

When zero trust and access orchestration are used together, least privilege can look implemented while still being unenforced in practice. Zero trust policies often govern path and session conditions, while orchestration layers decide when credentials are minted, refreshed, or revoked. If those decisions are split across teams without a single accountable owner for the underlying resource entitlement, over-privilege persists behind a compliant-looking control stack.

This matters because most breaches do not begin with an abstract policy failure. They begin when a service account, token, or automated workflow can do more than it should. NHIMG’s Ultimate Guide to NHIs notes that 97% of NHIs carry excessive privileges, and 90% of IT leaders say proper NHI management is essential to zero-trust success. That combination shows the real risk: shared responsibility can easily become no responsibility.

Practitioners should anchor accountability in the resource owner and the policy owner, then require network, identity, and platform teams to enforce their part of the control. In practice, many security teams discover privilege drift only after an access path has already been orchestrated into production and abused.

How It Works in Practice

Least privilege is enforced correctly when each layer has a defined job. Zero trust architecture should decide whether the request context is trustworthy enough for a session to exist at all, while access orchestration should decide what entitlement is issued, for how long, and under which approval path. The actual privilege boundary still belongs to the application, data, or infrastructure owner, because that team understands the resource and the business case for access.

Current guidance from NIST SP 800-207 Zero Trust Architecture and the OWASP Non-Human Identity Top 10 points toward a model where entitlement decisions are explicit, logged, and reviewable. In a mature operating model, that usually means:

• Resource owners define which actions are permitted on their assets.
• Identity or platform teams implement the policies and approvals in the orchestration system.
• Zero trust teams enforce context checks such as device trust, network state, or session risk.
• All three teams review exceptions and expiry dates on a regular cadence.

NHIMG’s Guide to SPIFFE and SPIRE is useful here because workload identity helps prove what the workload is, but it does not by itself decide what it should be allowed to do. That distinction matters: cryptographic identity strengthens authentication, while least privilege still requires policy ownership, approval workflows, and revocation discipline. These controls tend to break down when orchestration tools are managed centrally but the resource owner is never forced to sign off on the actual entitlement scope.

Common Variations and Edge Cases

Tighter orchestration often increases operational overhead, requiring organisations to balance faster automation against stronger ownership controls. That tradeoff becomes visible in environments with many service accounts, ephemeral workloads, or delegated admin models, where teams may assume that a valid session equals a valid privilege. It does not.

There is no universal standard for this yet, but current guidance suggests a few patterns. In highly regulated environments, the resource owner should be the final approver for standing access, while automation can handle short-lived access within pre-approved guardrails. In platform-heavy environments, the policy owner may centralise the rules, but each application team still owns the acceptable action set and exception review. In federated organisations, access orchestration often spans multiple control planes, so accountability must be written into the process rather than assumed from tooling.

The practical test is simple: if a privilege can be granted, extended, or silently inherited without the resource owner seeing it, least privilege is not truly enforced. That is why NHIMG’s Ultimate Guide to NHIs — Standards and the Ultimate Guide to NHIs — Key Challenges and Risks both emphasise lifecycle control and excessive privilege reduction. In edge cases such as emergency break-glass access, the exception should be time-bound, logged, and reviewed by the resource owner after the fact.

Related resources from NHI Mgmt Group

• How do Zero Trust and least privilege work together in cloud and remote access?
• Who is accountable for enforcing stronger authentication controls when regulations and zero-trust requirements tighten?
• Why do NHIs complicate zero trust and least privilege efforts?
• How should security teams govern API keys used for generative AI access?