The combined network of human, machine, cloud, and third-party access relationships across on-premises and cloud systems. It becomes the real control surface when organisations need to understand how AI tools inherit and exercise access.
Expanded Definition
A Hybrid access graph is the practical map of who and what can reach systems across cloud, on-premises, SaaS, and partner environments. In NHI security, it captures human identities, service accounts, workload identities, API keys, tokens, and the trust links between them, including delegated access and inherited permissions.
Definitions vary across vendors because some platforms model only identity-to-resource edges, while others also include workload-to-workload trust, secrets distribution, and policy inheritance. NHI Management Group treats the graph as the control surface that reveals where access actually exists, not just where it was intended. That distinction matters because an AI agent can inherit access through a chain of roles, tokens, and automation pathways even when no single system shows the full picture. For a standards-oriented view of identity assurance and access governance, practitioners often pair this concept with the OWASP Non-Human Identity Top 10 and the trust principles in NIST SP 800-207.
The most common misapplication is treating the hybrid access graph as a static asset inventory, which occurs when teams ignore ephemeral credentials and cross-domain trust relationships.
Examples and Use Cases
Implementing a Hybrid Access Graph rigorously often introduces operational overhead, requiring organisations to weigh complete visibility against the cost of continuous discovery and relationship mapping.
- A security team maps a CI/CD pipeline that can mint cloud credentials, then traces where those credentials are reused in production automation.
- An AI agent is found to inherit database access through a chain of service account delegation, role assignment, and a stored token.
- A merger review team combines on-premises Active Directory links with SaaS entitlements to identify duplicate or shadow access paths.
- A third-party integration is discovered to have persistent API access into a billing platform even after the vendor contract changed.
- A response team uses the graph to trace an exposed secret back to the repositories, vaults, and automation jobs that can still invoke it.
This is why NHI Management Group emphasizes access-path visibility in the Ultimate Guide to NHIs and the related discussion of Ultimate Guide to NHIs — Key Challenges and Risks.
Why It Matters in NHI Security
Hybrid Access Graphs matter because most NHI incidents are not caused by one bad credential alone. They emerge when excess privilege, stale secrets, third-party exposure, and incomplete offboarding combine into a reachable path. NHI Mgmt Group reports that 97% of NHIs carry excessive privileges, which makes relationship mapping central to containment and least privilege.
Without the graph, organisations miss how an exposed token can traverse environments or how an agent can inherit authority from a parent workflow. That creates blind spots in zero trust, incident response, and access review. The issue is not just discovery but governance: every edge in the graph can become a path to data movement, privilege escalation, or lateral use of secrets. The threat patterns are consistent with findings in the 52 NHI Breaches Analysis and the control expectations described by the OWASP Non-Human Identity Top 10.
Organisations typically encounter the operational need for a Hybrid Access Graph only after a compromise, when investigators must reconstruct how an AI agent, service account, or vendor integration reached sensitive systems.
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 address the attack and risk surface, while NIST CSF 2.0 and NIST Zero Trust (SP 800-207) set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Hybrid access graphs expose NHI trust paths, privilege edges, and secret-driven access chains. |
| NIST CSF 2.0 | PR.AC-4 | Access permissions and remote access governance depend on understanding cross-domain identity relationships. |
| NIST Zero Trust (SP 800-207) | S-1 | Zero trust requires explicit knowledge of trust relationships and policy enforcement across environments. |
Continuously review identity-to-resource paths and revoke unnecessary cross-environment access.
Related resources from NHI Mgmt Group
- How can organisations secure third-party privileged access in hybrid environments?
- How should teams govern access across hybrid IAM and GRC environments?
- When does just-in-time access reduce risk in hybrid identity environments?
- How should security teams govern privileged access in cloud and hybrid environments?
