Accountability should sit with a shared identity security function, backed by application owners, infrastructure owners, and security governance. Human and non-human identities touch multiple domains, so responsibility must be explicit for discovery, remediation, and recertification. Clear ownership prevents issues from being treated as someone else’s problem and helps organisations close exposure faster.
Why This Matters for Security Teams
Identity vulnerability management fails fastest when ownership is ambiguous. Human accounts, service accounts, API keys, and machine tokens all carry different risks, but attackers do not care which team created them. They exploit the weakest identity path, then move across systems that no single owner monitors end to end. NHI Management Group notes that only 5.7% of organisations have full visibility into their service accounts in the Ultimate Guide to NHIs, which shows why accountability must be explicit.
Security teams often assume identity issues will be handled by IAM, infrastructure, or application teams on a case-by-case basis. That assumption creates gaps in discovery, patching, rotation, and recertification. A shared identity security function is needed to set standards, track exposure, and force closure dates, while owners of applications and platforms handle remediation in their environments. Current guidance from NIST Cybersecurity Framework 2.0 supports clear governance and accountability, but organisations still need a named operating model to make it real. In practice, many security teams encounter identity exposure only after a secrets leak or privilege misuse has already affected production.
How It Works in Practice
The cleanest model is a shared control function with explicit handoffs. The identity security function owns policy, visibility, prioritisation, and reporting. Application owners own the identities used by their services and pipelines. Infrastructure owners own platform-level identities such as orchestration, cloud, and directory service accounts. Security governance owns exception review, risk acceptance, and executive escalation. This structure prevents discovery from being separated from remediation.
Operationally, the shared function should maintain an inventory of all identity types, classify them by privilege and business criticality, and assign a remediation SLA. For human identities, that includes stale admin roles, inactive accounts, and access-review failures. For non-human identities, it includes long-lived secrets, excessive privileges, weak rotation, and orphaned tokens. The evidence base in Top 10 NHI Issues and the NHI Lifecycle Management Guide shows why lifecycle ownership matters as much as initial provisioning.
- Define one accountable owner for discovery, one for remediation, and one for approval of exceptions.
- Use a single queue for identity findings so human and non-human issues are triaged by risk, not by team boundary.
- Require proof of rotation, revocation, or access removal before closing findings.
- Recertify high-risk identities on a fixed schedule, with tighter review for privileged service accounts and keys.
For governance, map these responsibilities to control families in NIST SP 800-53 Rev. 5 and align reporting to the control owner, not just the technical team. These controls tend to break down in heavily federated environments where identity data is fragmented across cloud platforms, SaaS tools, and CI/CD systems because no single team can prove complete coverage.
Common Variations and Edge Cases
Tighter identity accountability often increases coordination overhead, requiring organisations to balance faster remediation against clearer ownership boundaries. That tradeoff becomes more visible when business units run independent platforms, or when identity services are outsourced and internal teams do not directly administer the systems creating the exposure.
There is no universal standard for this yet, but current guidance suggests the accountable function should remain internal even when execution is delegated. Managed service providers can rotate credentials or close accounts, but they should not own the risk decision or the policy that determines whether an identity is acceptable. The same is true for developers who create service accounts in code or pipelines: they may execute remediation, yet the identity security function still needs visibility and enforcement authority.
Edge cases also matter in mergers, shared platforms, and legacy directories. In those environments, owners are often unclear, which makes stale access and orphaned machine identities linger longer than expected. Organisations should treat these cases as governance exceptions, not as a reason to dilute accountability. The lessons from 52 NHI Breaches Analysis and the threat context in CISA cyber threat advisories point to the same outcome: when ownership is unclear, identity exposure persists longer and is harder to close.
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 CSF 2.0, NIST SP 800-53 Rev 5 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 | Identity discovery and ownership are core to reducing unmanaged NHI exposure. |
| NIST CSF 2.0 | GV.OC-01 | Clear governance and accountability are required for cross-domain identity risk. |
| NIST SP 800-53 Rev 5 | AC-2 | Account management control supports lifecycle ownership for human and machine identities. |
| CSA MAESTRO | IR-01 | Agent and workload identity governance depends on explicit operational responsibility. |
| NIST AI RMF | AI RMF governance applies where autonomous systems create or use identities. |
Assign one owner for each NHI and verify every identity is inventoried, reviewed, and remediated on schedule.
Related resources from NHI Mgmt Group
- Who should be accountable for cloud identity governance when both developers and non-human identities need access?
- Who should be accountable for approving and reviewing non-human identity access across integrated systems?
- Who is accountable for governing blended identities across human, non-human, and AI access?
- How should organisations integrate identity threat intelligence across cloud and on-prem environments for non-human identities?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on August 28, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
