Who is accountable when identity-based attacks move through trusted access paths?

Why This Matters for Security Teams

When identity-based attacks move through trusted access paths, the failure is rarely a single technical control. It is usually a governance gap across IAM, security operations, and the business owner that approved the identity class in the first place. Attackers do not need to “break in” if they can borrow valid access, especially when NHIs already sit inside automation, CI/CD, API integrations, and third-party workflows. NHIMG’s Ultimate Guide to NHIs notes that 80% of identity breaches involved compromised non-human identities such as service accounts and API keys, which is why accountability has to extend beyond the security team.

The practical question is not whether the credential was stolen, but who owned the controls that allowed it to remain trusted, valid, and reusable. That is where current guidance from the OWASP Non-Human Identity Top 10 is most useful: it frames NHI risk as an identity lifecycle problem, not just a detection problem. In practice, many security teams encounter this only after a valid token has already been used to move laterally through systems that still trusted it.

How It Works in Practice

Accountability should follow the trust boundary, meaning the team that defines, issues, and approves access must also own verification, monitoring, and revocation. For human users, that is often straightforward. For NHIs, workload credentials, and agentic systems, the owning function may be platform engineering, application owners, cloud operations, or a product team with delegated authority. The control objective is to ensure that every trusted path has a named owner, a documented purpose, and a review cadence that matches the credential’s risk.

In operational terms, this usually means:

• Assigning one accountable owner for each identity class, not just a technical administrator.
• Mapping third-party and workload access to explicit business approval and renewal workflows.
• Using short-lived credentials where possible, then tying monitoring to issuance, use, and revocation events.
• Reviewing privilege drift, unused access, and shared secrets as part of routine governance, not after an incident.

This matters because trusted access paths are exactly what attackers try to preserve. If a service account, API key, or federated token is valid for too long, the attacker can operate as the trusted workload rather than as an obvious intruder. NHIMG’s 52 NHI Breaches Analysis shows how often these identities become the pivot point, while CISA’s cyber threat advisories repeatedly reinforce that valid credentials are a common route for persistence and lateral movement. Where organisations mature fastest is in making access ownership auditable, so there is no ambiguity when a trusted path is abused. These controls tend to break down in environments with shared service accounts, informal API key distribution, and outsourced operations because no single team can revoke or attest to the trust relationship quickly enough.

Common Variations and Edge Cases

Tighter access ownership often increases operational overhead, requiring organisations to balance faster delivery against stronger accountability. That tradeoff is especially visible in cloud-native and AI-driven environments, where teams want reusable access for automation but still need precise responsibility for misuse.

Best practice is evolving for agentic systems and multi-party workflows. For example, an autonomous agent may act under delegated workload identity, but the accountable party is still the organisation that approved the policy, scopes, and safeguards. There is no universal standard for this yet, but current guidance suggests treating agent, tool, and service-account trust as separate approval domains rather than one shared identity pool. The Anthropic report on AI-orchestrated cyber espionage and the MITRE ATLAS adversarial AI threat matrix both show why trusted tool paths can be chained in ways teams do not anticipate.

Accountability also gets murky with vendors and managed service providers. The vendor may operate the system, but the customer still owns the risk acceptance if its business processes rely on that access. For that reason, governance reviews should explicitly name who can approve, who can revoke, who monitors, and who signs off on exceptions. NHI Mgmt Group’s Why NHI Security Matters Now is a useful reminder that trust without continuous verification becomes a liability quickly.

Related resources from NHI Mgmt Group

• How do security teams move from access provisioning to real identity governance?
• Who is accountable when compromised identities are used to move through the environment?
• What is the difference between role-based access and API key governance for NHI security?
• Who is accountable when an attacker reuses valid access to move through systems?