Accountability should sit with the business and control owners who approve and remediate access, while security and compliance define the control framework and evidence expectations. In practice, application owners must validate access, IAM or governance teams must enforce policy, and executives should require measurable reduction in toxic or unnecessary access.
Why This Matters for Security Teams
When access risk spans security, compliance, and application owners, the main failure is not usually a missing policy. It is unclear accountability for who approves access, who proves it is necessary, and who removes it when it is no longer needed. That ambiguity is where toxic access accumulates, especially for non-human identities and shared service accounts. NHI governance guidance from Ultimate Guide to NHIs — Regulatory and Audit Perspectives and the NIST Cybersecurity Framework 2.0 both point toward defined ownership, but real-world programs still blur the line between control design and control operation.
The practical risk is that security teams can define least privilege and compliance can demand evidence, yet application owners remain the only people who understand whether access is still justified. Without a named business owner for each entitlement, reviews become checkbox exercises and risk reduction stalls. NHIMG research highlights how quickly this becomes material: in The State of Non-Human Identity Security, lack of credential rotation was cited as a top cause of NHI-related attacks by 45% of organisations. In practice, many security teams encounter excessive access only after an audit finding or incident has already exposed it.
How It Works in Practice
Accountability works best when it is split by function, but not by outcome. Security owns the access control standard, compliance defines what evidence must exist, IAM or governance teams automate enforcement, and application owners approve whether a specific entitlement is actually required. The business owner should be answerable for the risk of granting or keeping access, because that owner understands operational necessity. This aligns with the control intent in OWASP Non-Human Identity Top 10 and with NIST guidance on control ownership in NIST SP 800-53 Rev 5 Security and Privacy Controls.
A workable operating model usually includes:
- Named control owners for each system, dataset, and NHI population.
- Approval workflows that require the application owner to attest to business need.
- Evidence standards that compliance can validate without reinterpreting access intent.
- Automated removal or escalation when access is unreviewed, unused, or over-privileged.
- Exception handling with expiry dates, not open-ended risk acceptance.
For NHI-heavy environments, this should include service principals, API keys, OAuth grants, and agent credentials. The most useful model is not a committee that shares responsibility, but a RACI-style structure that makes one owner accountable for approval and one technical team accountable for enforcement. The accountability line should also be visible in lifecycle controls described in Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs. These controls tend to break down when ownership is spread across federated platforms and no single application team can confirm whether access remains justified.
Common Variations and Edge Cases
Tighter access governance often increases operational overhead, requiring organisations to balance speed of delivery against review depth and owner participation. That tradeoff becomes sharper in cloud, platform engineering, and agentic workflows, where access changes rapidly and ownership may be distributed across teams.
Current guidance suggests that compliance should not be the final approver for access risk. Compliance can define the control objective and challenge weak evidence, but it rarely has enough operational context to determine whether an entitlement is still needed. Security can enforce policy, yet it should not inherit business accountability just because it owns the tooling. For autonomous systems and agentic AI, this distinction matters even more because access can be created dynamically, used briefly, and then forgotten unless the application owner is required to review it. That risk pattern is reinforced in Top 10 NHI Issues and in the ISO/IEC 27001:2022 Information Security Management approach to assigned responsibilities.
There is no universal standard for this yet, but the strongest programs treat accountability as measurable: every entitlement has an owner, every review has an attestor, and every exception expires. That model is especially important when vendor integrations, delegated admin, or shared automation accounts make it difficult to trace who truly benefits from the access.
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 | Ownership and lifecycle control are central to reducing NHI access risk. |
| NIST CSF 2.0 | PR.AC-4 | Least-privilege access management depends on clear approval and review accountability. |
| NIST SP 800-53 Rev 5 | AC-2 | Accountable account management is needed to approve, review, and disable access on time. |
| CSA MAESTRO | GOV-02 | Agent and workload governance requires explicit ownership across operational roles. |
| NIST AI RMF | GOVERN | AI governance requires accountability for decisions, oversight, and risk remediation. |
Map every entitlement to an accountable owner and remove access that lacks business justification.
Related resources from NHI Mgmt Group
- How should organisations extend access governance across complex application environments without losing control of compliance risk?
- Who is accountable when access governance fails in a complex application estate?
- Who is accountable when an organisation accepts mediocre identity security and later suffers preventable risk or compliance issues?
- Who is accountable for secret leakage and privileged access exposure when teams rely on shared governance across security and engineering?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on August 26, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
