Ownership should sit with the team that manages the authoritative zone, while PKI teams receive narrowly scoped permission for validation tasks only. That model preserves accountability, keeps operational control with DNS administrators, and avoids turning certificate workflows into a shared-write environment.
Why This Matters for Security Teams
When DNS and PKI both touch the same zone, the real risk is not just operational friction. It is ambiguous authority over a security-critical control plane. DNS changes affect certificate validation, domain ownership proof, and incident response timing, so shared-write access can create broken issuance, audit gaps, and unauthorized record changes. NIST’s NIST Cybersecurity Framework 2.0 treats identity and access governance as a core control concern, and that applies here as well.
For NHI-heavy environments, DNS also becomes part of the trust fabric for service identities, ACME challenges, and automated validation. NHIMG research shows that 97% of NHIs carry excessive privileges, which is why shared operational ownership often expands access beyond what is necessary. The lesson from the Ultimate Guide to NHIs is that hidden privilege usually grows fastest where multiple teams assume “temporary” access will stay temporary. In practice, many security teams discover DNS entitlement drift only after certificate renewal fails or a zone record is altered outside change control.
How It Works in Practice
The cleanest operating model is to keep authoritative DNS ownership with the DNS administration team and grant PKI tooling only the minimum permissions needed to complete validation tasks. That usually means scoped access to specific record types, specific zones, and a narrow time window, not broad editor rights across the zone. Current guidance suggests treating these permissions as task-bound and revocable, not as standing collaboration access.
In practice, this works best when DNS and PKI workflows are separated into three layers:
- Zone ownership, change approval, and rollback remain with DNS operators.
- PKI automation receives narrowly scoped access for ACME or DNS-based validation only.
- Policy and logs record who requested the change, what was modified, and when access expired.
This model aligns with the operational lessons in the Schneider Electric credentials breach, where over-permissioned identity paths amplified blast radius. It also fits the direction of NIST Cybersecurity Framework 2.0, which emphasises clear governance, access control, and recovery discipline. For high-trust environments, the practical pattern is to issue just-in-time permission for validation jobs, then revoke it automatically when the job completes. These controls tend to break down when certificate automation is embedded directly into general-purpose CI/CD pipelines because pipeline service accounts often inherit broader zone permissions than the validation step actually requires.
Common Variations and Edge Cases
Tighter DNS control often increases workflow overhead, requiring organisations to balance fast certificate automation against the risk of uncontrolled zone edits. That tradeoff becomes most visible in multi-team environments, M&A integrations, and outsourced operations where different groups believe they “own” the same domain for different purposes.
There is no universal standard for this yet, but current guidance is consistent on one point: split authority from execution. If the PKI team needs recurring validation access, it should be implemented as a bounded service workflow with explicit approval, short TTLs, and audit logging rather than permanent shared ownership. If DNS administrators are unavailable during renewal windows, the answer is usually better scheduling or delegated automation, not broader standing privileges.
Exceptions can exist for emergency recovery or registrar-level incidents, but those should be pre-approved break-glass paths with strong logging and post-event review. In organisations with many zones or subsidiaries, the safest model is often zone-specific delegation rather than cross-domain write access. That approach preserves accountability while still allowing certificate automation to function reliably.
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 | Shared DNS write access can create over-privileged non-human identities. |
| NIST CSF 2.0 | PR.AC-4 | This question is about enforcing least privilege across zone dependencies. |
| NIST AI RMF | Automated certificate workflows require governance over delegated machine actions. |
Assign authoritative DNS ownership clearly and restrict PKI access to the smallest needed scope.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 23, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
