Use a narrower custom role or a more limited administrative role that covers only the EKM connection tasks the operator actually needs. Restrict it to a small set of trusted administrators, because connection administration can affect key availability and trust boundaries across external key management integrations.
What replaces the EKM Connections Admin Role in practice?
For least privilege, the right replacement is not another broad predefined admin role. Use a custom role or the least powerful administrative role that still allows the exact EKM connection actions the operator needs, and keep that scope tightly limited to the administrators who actually manage external key management links.
The practical test is whether the role can do only connection-specific administration, not broader key management or unrelated project administration. That usually means separating day-to-day connection maintenance from roles that can alter keys, policies, or trust relationships, so the person approving a connection change is not automatically empowered to make wider changes elsewhere.
When Google Cloud IAM is being tuned for least privilege, start with the control boundary: role design, role assignment, and who can administer the connection path. NHIMG’s Google Cloud IAM and Service Accounts Guide is the best starting point for understanding how predefined roles, custom roles, and service-account access fit into that boundary.
Why broad connection admin rights create avoidable exposure
EKM connection administration is sensitive because it sits on the trust path between Cloud KMS and an external key management system. A broad admin role can let one operator change connection settings, widen access, or accidentally disrupt the availability of protected keys, so least privilege is not just a permissions hygiene issue, it is a control over key availability and trust boundaries.
Failure mechanism: oversized administrative access makes it easier for a mistake or compromise to alter the connection, expose metadata about the integration, or create a path to broader cryptographic operations than the operator intended to manage.
Impact: the result can be loss of confidence in the external key management link, unexpected downtime for dependent workloads, or an expanded blast radius if an account with connection authority is misused.
Connection admin rights are also worth treating as part of a wider privilege-management pattern. NHIMG’s Privileged Access Management Guide is relevant because the decision here is fundamentally about reducing standing privilege, not just renaming a role.
For the same reason, the broader NHI lifecycle issue is not the role name itself but whether the privilege is reviewed, limited, and retired when no longer needed. The NHI Lifecycle Management Guide covers the governance pattern that keeps access from lingering after the operational need has passed.
How to choose the smallest workable admin footprint
Build the replacement role from the task, not from the title. If the operator only needs to create, update, inspect, or validate EKM connection settings, give only those permissions and nothing that would let them administer unrelated KMS resources or other cloud assets.
The best proxy for correctness is whether the role still works if you remove every permission that is not required to complete the exact connection task. If a permission is needed only “just in case”, it usually does not belong in the least-privilege version.
That is the same principle used when right-sizing cloud privilege more generally. The Cloud PAM and CIEM Guide is useful when you want to compare effective permissions against granted permissions and decide where an administrative role is larger than the workload really needs.
If the operator account is human-administered, pair the narrow role with tight assignment control and review. If it is a service or automation account, be stricter still, because an automated principal with broad connection rights can scale a configuration error or compromise very quickly across multiple environments.
Where Google Cloud patterns are concerned, the main anchor is still the IAM model itself. Google Cloud Security Guide is useful context for seeing how IAM, service accounts, and cloud policy controls fit together around KMS-adjacent administration.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
NIST SP 800-53 Rev 5 sets the technical controls, while ISO/IEC 27001:2022 defines the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | IA-2 — Identification and Authentication (Organizational Users) | Connection admin access should be limited to authenticated admins. |
| AC-6 — Least Privilege | The question is explicitly about replacing broad admin access with narrower permissions. | |
| AC-5 — Separation of Duties | Connection administration should be separated from broader key and policy control. | |
| Recommendation — Require strong admin authentication before allowing EKM connection changes. Grant only the EKM connection permissions the operator needs. Split connection administration from broader KMS and trust administration. | ||
| ISO/IEC 27001:2022 | A.5.15 — Access control | Least-privilege role design is an access-control decision for privileged administration. |
| Recommendation — Define access rules that restrict EKM connection administration to necessary tasks. | ||
Practitioner Guidance
What to prioritise: Replace the broad predefined role with the least powerful custom role that still completes the exact EKM connection workflow, then scope assignment to a very small administrator set. Treat any extra permission as a separate exception that needs justification.
What to verify: Confirm the chosen role cannot modify unrelated KMS resources, cannot broaden access outside the connection task, and is reviewed on the same cadence as other privileged cloud roles. If you cannot explain why a permission is needed in the connection workflow, remove it.
Common mistake: Teams often keep a broad predefined role because it is faster to operate, then assume the low frequency of changes makes it safe. In practice, infrequent use is exactly why these roles are easy to forget, overgrant, and leave in place.
Practitioner takeaway: The least-privilege answer is a task-scoped administrative role, not a generic admin label, and the role should be narrow enough that it cannot become a hidden path to wider trust or key-management change.
Related resources from NHI Mgmt Group
- What should be used instead of the Google Cloud KMS Admin Role for least privilege?
- What should be used instead of the Google Cloud Storage Admin role for least privilege?
- What should be used instead of the Google Cloud Security Admin role for least privilege?
- What should be used instead of the Google Cloud Workload Identity Pool Admin Role for least privilege?