Start with the highest-risk workflows, such as payments, payroll, vendor setup, and privileged admin actions. Then check whether any role can both start and approve the same event, or hide the evidence after the fact. That reveals the control gap faster than reviewing every role in the organisation.
What auditors should check first when SoD gaps appear
When segregation of duties breaks down, the fastest way to find the real control failure is to start where the business impact is highest and the audit trail is easiest to distort. That usually means a small set of financially sensitive or privilege-heavy workflows, then the specific roles that can both initiate and approve, or act and conceal, the same transaction.
The first pass should ask whether the same person, role, or service account can create the event, approve it, reverse it, or suppress the evidence. If that chain exists in a high-risk process, the gap is already operationally material even before you review the wider role catalogue.
Look for workflows where conflict combinations are most likely to hide loss or abuse: payments, payroll, vendor onboarding, journal adjustments, privileged admin changes, and exception handling. These are the places where SoD failures tend to become fraud, unauthorized change, or control override instead of remaining a theoretical policy issue.
Which SoD conflicts matter most to IAM teams
IAM teams should concentrate on toxic combinations, not on abstract role names. A role model can look clean on paper while still allowing one identity to start and finish a sensitive process through multiple accounts, delegated access, or a privileged workflow path.
The practical question is whether access design creates a single point of control over both execution and approval. If a role can request a payment, approve its own request, and then alter logs or workflow evidence, the IAM design has crossed from a convenience problem into a control failure.
IAM teams also need to test for hidden overlap across entitlement sets, shared admin roles, emergency access, and service accounts used in approval flows. SoD gaps often appear when separate functions are combined through role inheritance, exception access, or “temporary” access that never gets removed.
For a structured view of SoD conflict patterns and mitigating controls, teams often align the review to the Segregation of Duties (SoD) Guide, which treats toxic combinations and compensating controls as first-class design problems rather than after-the-fact audit findings.
How to triage evidence before expanding the review
Use evidence that shows whether the control breaks are real in live workflows, not just possible in the role matrix. That means transaction logs, approval history, privileged session records, exception tickets, and the current state of delegated access. If those sources do not line up, the SoD issue may be larger than the initial role conflict suggests.
Start with the processes where access and workflow control intersect most tightly, then trace who can approve, override, or backdate changes. In practice, that means checking whether the person who can trigger a sensitive action can also complete, mask, or ratify it after the fact.
At scale, SoD review becomes an inventory problem as much as a control problem. If teams cannot reliably identify the owners, approvers, and fallback paths for critical workflows, the organisation will miss conflicts until an incident, an audit test, or a failed detective control exposes them.
Risk and Threat Considerations
SoD gaps create direct exposure to fraud, unauthorized changes, and concealed abuse because they collapse initiation, approval, and evidence retention into the same control path. The danger is highest where a single role can move value, change configuration, or erase the trace after the transaction is complete.
Failure mechanism: A conflicted role, shared account, or privileged workflow lets one identity execute both sides of a control, then exploit weak logging, delayed review, or exception handling to avoid detection.
Impact: Losses can include payment fraud, false approvals, silent vendor setup abuse, payroll manipulation, unauthorized privileged changes, and audit evidence that no longer proves who did what.
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 and CIS Controls v8 set the technical controls, while ISO/IEC 27001:2022 and SOC 2 (AICPA) define the regulatory obligations.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | AC-5 — Separation of Duties | SoD gaps map directly to separation of duties controls. |
| AU-9 — Protection of Audit Information | Evidence suppression is part of the gap when one role can hide actions. | |
| Recommendation — Enforce independent approval and execution paths for high-risk transactions. Protect audit records from alteration by conflicted roles. | ||
| ISO/IEC 27001:2022 | A.5.3 — Segregation of duties | This Annex A control directly addresses SoD conflicts in business processes. |
| Recommendation — Define and enforce conflicting-duty rules for sensitive workflows. | ||
| CIS Controls v8 | CIS-5 — Account Management | SoD review depends on role design, privileged access, and account overlap. |
| Recommendation — Review and right-size access for roles that approve or execute sensitive actions. | ||
| SOC 2 (AICPA) | CC6.1 — Logical and physical access controls | SoD gaps are access-control failures that affect approval and execution paths. |
| Recommendation — Separate approval, execution, and evidence privileges in sensitive processes. | ||
Practitioner Guidance
What to prioritise: Audit the smallest set of high-value workflows first, then map every role that can initiate, approve, override, or suppress evidence in those flows. That will usually expose the real SoD gap faster than a full-role recertification exercise.
What to verify: Confirm that each critical workflow has at least one independent approval path and that no role can complete the transaction and its attestations alone. Also verify whether emergency access, delegated admin, or service accounts create an undocumented bypass.
Decision rule: If one identity can both influence the business event and alter the trail, treat it as a control break even if the access was “temporary” or operationally justified. Exception access without compensating monitoring is only a deferred finding.
Practitioner takeaway: The fastest SoD review is not role coverage by volume, it is conflict testing by workflow, because the highest-risk combinations are the ones that let one actor control both the action and the proof.
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Reviewed and updated by the NHIMG editorial team on October 6, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org