Should organisations give third-party identities the same governance as employee accounts?

Why This Matters for Security Teams

Third-party identities are not a side category. They are a parallel access layer that can touch production data, SaaS admin panels, CI/CD pipelines, and sensitive APIs. If they are governed differently from employee accounts, the organisation creates two standards of control for the same risk surface. NHI governance should therefore cover ownership, review cadence, expiry, and revocation in one lifecycle, not in separate trust silos. NHI lifecycle guidance in the Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs and the risk framing in OWASP Non-Human Identity Top 10 both point to the same operational reality: trust source does not reduce the need for control. External identities often arrive through vendors, contractors, integrations, and service providers, which means ownership can be unclear and access can persist after the business need ends. In practice, many security teams discover this only after an audit finding, a stale integration, or a partner-led incident has already exposed the gap.

That is why organisations should treat partner accounts, OAuth grants, API keys, service principals, and contractor access as governed identities, not exceptions. The more distributed the estate becomes, the more likely uncontrolled third-party access will become the easiest path to privilege creep.

How It Works in Practice

Effective governance starts with inventory. Security teams need a complete register of third-party identities, the business owner for each one, the source of trust, the systems it can reach, and the expiry or review date. That inventory should feed the same lifecycle process used for employees, including approval, periodic certification, step-up controls, and fast revocation. The Top 10 NHI Issues highlights why this matters: over-privilege, missing rotation, and weak visibility are recurring failure modes, especially when access is created outside standard IAM workflows.

In practice, organisations should apply least privilege through RBAC where roles are stable, and supplement it with just-in-time access where third-party work is time-bound. For higher-risk connections, use time-limited secrets, approved scopes, and explicit approval gates for elevation. For cloud and SaaS integrations, log the grant source, token scope, and downstream API reach so reviewers can answer three questions quickly: who owns it, what can it do, and when does it expire?

• Bind each third-party identity to a named internal owner.
• Set expiry dates by default, not by exception.
• Rotate secrets and tokens on a fixed schedule or immediately after contract changes.
• Re-certify access on the same cadence as employee privileged access.
• Revoke access through the same offboarding workflow used for staff exits.

This approach aligns with the control intent described in the Ultimate Guide to NHIs — Regulatory and Audit Perspectives and the access control model in NIST Cybersecurity Framework 2.0, which both emphasise accountable access governance. These controls tend to break down when third-party identities are provisioned directly in SaaS tools without central ownership, because no one receives a reliable signal when the business relationship changes.

Common Variations and Edge Cases

Tighter governance often increases onboarding friction, requiring organisations to balance speed for partners against stronger control over privileged access. That tradeoff is real, especially where vendors need emergency access, short project windows, or machine-to-machine integrations that cannot wait for manual review. Current guidance suggests the answer is not to weaken governance, but to tailor the control pattern to the risk tier. Low-risk access may use standard RBAC and periodic review, while high-risk access should use JIT approvals, short-lived secrets, and more aggressive monitoring.

There is no universal standard for this yet across all SaaS ecosystems, but best practice is evolving toward the same principle: every external identity must have an accountable owner and an end date. The compromise data in 52 NHI Breaches Report and the incident patterns in Reviewdog GitHub Action supply chain attack show how quickly exposed secrets and over-broad integrations can turn into lateral movement. The same lesson applies to vendors who use shared admin accounts, unmanaged API tokens, or delegated OAuth grants: if the access path cannot be individually owned and promptly revoked, it should not be treated as routine.

For organisations with high turnover in suppliers or complex multi-cloud estates, the safest model is to treat third-party identity governance as a living control domain, not a procurement checkbox. That keeps access decisions tied to real business need instead of trust assumptions that age badly.

Related resources from NHI Mgmt Group

• Why do non-human identities create a larger governance problem than human accounts?
• Why do non-human identities create more audit risk than human accounts?
• How should security teams govern non-human identities alongside human accounts?
• How can organisations reduce the blast radius of compromised agent identities?