Who is accountable when a SoD conflict leads to fraud or compliance failure?

Why This Matters for Security Teams

Segregation of duties failures are rarely just policy defects. When a person can request, approve, and execute a sensitive action, the control environment stops being preventive and becomes documentary. That is why accountability typically rests across the control owner, the approver, and the governance function, especially when the conflict was known but not remediated. NIST Cybersecurity Framework 2.0 makes this explicit by emphasizing ownership of risk decisions and access governance, while audit practice expects evidence that exceptions were reviewed and closed.

For NHI programs, the stakes are higher because service accounts, API keys, and automated workflows can inherit human approval gaps without any obvious user prompt. The Ultimate Guide to NHIs — Regulatory and Audit Perspectives frames this as a governance problem, not just an identity problem. The practical lesson is that a SoD conflict becomes a fraud issue when it is allowed to persist, not when it is first detected. As NIST Cybersecurity Framework 2.0 suggests, accountability must be assigned to the parties with authority to prevent, approve, and remedy the risk.

In practice, many security teams encounter SoD breakdowns only after an investigation, not through intentional control design.

How It Works in Practice

Operationally, accountability follows the control chain. The control owner defines the rule, the approver validates the exception, and the governance or compliance function verifies that the exception is time-bound, documented, and remediated. If a conflict leads to fraud or a regulatory miss, investigators usually ask three questions: who designed the control, who accepted the exception, and who failed to escalate or close it. That map matters because a broken SoD process is often a multi-owner failure, not a single-person event.

For NHI environments, the same logic applies to non-human workflows. A privileged pipeline, bot, or integration can bypass meaningful review if it uses standing access, shared secrets, or overly broad roles. The Top 10 NHI Issues highlights why ownership, lifecycle control, and credential discipline need to be explicit rather than implied. Current guidance suggests pairing that with strong access review evidence, as described in the Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs, so every entitlement has an owner and an expiry.

• Define the approver, control owner, and reviewer in policy, then tie each to a named escalation path.
• Require exception tickets with expiry dates, compensating controls, and post-approval validation.
• Use periodic access recertification for both human and non-human identities, with evidence retained for audit.
• Remove standing privileges where possible and force sensitive actions through just-in-time approval workflows.

A useful signal is whether the process can prove who knowingly accepted the risk and when that risk was removed. These controls tend to break down when approval tooling is disconnected from the actual system of record because exceptions can persist without a reliable closure event.

Common Variations and Edge Cases

Tighter SoD enforcement often increases operational friction, so organisations must balance fraud prevention against delivery speed and support burden. There is no universal standard for every workflow, especially where emergency access, small teams, or outsourced operations make perfect separation impractical.

One common edge case is emergency override. Best practice is evolving, but current guidance suggests that emergency access should be separately approved, heavily logged, and reviewed after the fact rather than treated as a permanent exception. Another edge case is automation. If a bot can both create and approve a transaction, the control is functionally broken even when the bot is “just following policy.” The DeepSeek breach illustrates how quickly exposed credentials and over-permissive systems can turn governance gaps into broad exposure, while NIST Cybersecurity Framework 2.0 remains the clearest anchor for assigning risk ownership and remediation responsibility.

Where regulators or auditors get involved, the question is not only whether SoD existed on paper, but whether the organisation could show timely detection, escalation, and correction.

Related resources from NHI Mgmt Group

• Who is accountable when CJIS compliance breaks down in a multi-vendor access stack?
• How should security teams govern non-human identities for compliance?
• How should security teams govern non-human identities for SOC 2 compliance?
• Why do non-human identities create compliance risk even when policies exist?