Who is accountable when hidden access is found after an audit?

Why This Matters for Security Teams

Hidden access is not just an audit finding. It is evidence that identity, infrastructure, and application controls are not reconciled well enough to prove who can act in production. For NHI-heavy environments, the gap is often larger because service accounts, API keys, and automation tokens are easy to create, hard to inventory, and frequently left outside the normal joiner-mover-leaver process. The issue is closely tied to the visibility failures highlighted in Ultimate Guide to NHIs and the control expectations in OWASP Non-Human Identity Top 10.

Accountability should sit with the owners of the systems that grant, store, and use access, because they control the evidence needed to detect drift. HR can confirm employment status, but it cannot validate whether a dormant token still reaches a database, CI/CD pipeline, or cloud control plane. NHI Management Group reports that only 5.7% of organisations have full visibility into their service accounts, which explains why hidden access often persists until an audit or incident exposes it. In practice, many security teams encounter these failures only after access review has already been bypassed for months.

How It Works in Practice

When hidden access appears after an audit, the practical question is not who is blamed, but who owned discovery coverage. A defensible model assigns distinct responsibility for identity sources, infrastructure entitlements, and application-level permissions. That means the identity team manages inventory and reconciliation, platform teams expose cloud and directory permissions, and application owners prove in-app access paths. Current guidance from NIST Cybersecurity Framework 2.0 supports this kind of shared accountability across identify, protect, detect, and recover activities.

Operationally, teams should build a reconciliation loop that compares intended access, actual access, and active usage. For NHIs, that loop must include:

• service account inventories across directories, cloud accounts, and CI/CD systems
• secret and token inventories, including embedded credentials in code and configuration
• privilege reviews against actual runtime behaviour, not just approved roles
• evidence of last use, last rotation, and owner attestation

NHI Management Group’s Ultimate Guide to NHIs — Regulatory and Audit Perspectives frames this as a governance problem as much as a technical one. If no team is explicitly assigned to reconcile discovery sources, hidden access will survive even a clean audit sample because the audit only tests what the organisation can already see. These controls tend to break down when access is provisioned outside central IAM, especially in SaaS admin consoles, automation jobs, and legacy systems with local accounts.

Common Variations and Edge Cases

Tighter ownership models often increase operational overhead, requiring organisations to balance clear accountability against the effort of keeping every system mapped and current. That tradeoff becomes especially visible in hybrid estates, delegated admin models, and third-party integrations where the “owner” is split across teams or vendors. In those cases, best practice is evolving toward explicit RACI mappings, but there is no universal standard for this yet.

One common edge case is when access is technically valid but functionally unknown, such as inherited permissions in cloud groups, stale API keys, or embedded secrets that were never tracked in a formal vault. Another is when the business owner has approval authority but not the technical ability to verify live access. NHI Management Group’s 52 NHI Breaches Analysis shows why this matters: hidden access frequently persists through ordinary controls until someone is tasked with proving revocation, not just documenting intent. The practical answer is to assign accountability for continuous discovery, not only for cleanup after an exception is found.

Related resources from NHI Mgmt Group

• Who is accountable when a contractor still has privileged cloud access after departure?
• Who is accountable when third-party access remains active after the task is complete?
• Who is accountable when a device still has access after administrators believe it has been revoked?
• Who is accountable for inherited access after an M&A event?