How should security teams reduce identity drift in SaaS and NHI environments?

Why Identity Drift Becomes a Security Problem in SaaS and NHI

Identity drift matters because SaaS and NHI environments accumulate access faster than teams can re-validate it. Human users change roles, vendors connect new apps, service accounts outlive the workflows they were created for, and temporary exceptions become permanent. That creates a gap between approved access and actual entitlement, which is exactly where abuse begins. The issue is not just excess access, but unmanaged change across the identity lifecycle.

For NHI programs, the drift problem is amplified by scale and invisibility. NHI Management Group notes that only 5.7% of organisations have full visibility into their service accounts in the Ultimate Guide to NHIs, while 71% of NHIs are not rotated within recommended time frames. In SaaS estates, the same pattern appears as stale OAuth grants, copied roles, and unused admin paths that remain active long after the original business need has disappeared. Current guidance from the NIST Cybersecurity Framework 2.0 supports continuous monitoring and access governance, but the practical challenge is making those controls identity-aware across both human and machine accounts. In practice, many security teams discover drift only after an audit, an offboarding failure, or a vendor-led incident has already exposed it.

How Security Teams Reduce Drift Before It Becomes Normalised

The most effective approach is to treat identity drift as a continuous reconciliation problem, not a periodic cleanup task. Security teams should compare approved access, observed usage, and ownership on a recurring basis, then resolve mismatches quickly through automated workflows. That means mapping who or what owns each account, what business function it supports, when it was last used, and whether the entitlement still matches current policy.

For SaaS, that usually starts with discovery of connected apps, delegated OAuth grants, shared admin roles, and dormant integrations. For NHI, it also includes secrets, API keys, service accounts, workload identities, and CI/CD credentials. NHI Management Group’s Top 10 NHI Issues highlights why over-privileged accounts and poor rotation are recurring causes of exposure, which is why drift reduction has to include entitlement review, rotation, and offboarding together. The operational sequence is usually:

• Inventory all identities, including third-party and machine identities.
• Reconcile entitlements against documented ownership and approved purpose.
• Flag orphaned accounts, stale grants, copied roles, and temporary exceptions.
• Remove or reduce access using least privilege and time-bound approval.
• Recheck after change, because remediation itself can create new drift.

Teams that manage this well also use evidence from incidents to prioritise controls. The NHI breach pattern documented in the 52 NHI Breaches Analysis shows how missed rotation, exposed tokens, and lingering credentials repeatedly turn small oversights into account compromise. The control objective is to shorten the time between entitlement change and detection, then make revocation routine rather than exceptional. These controls tend to break down in highly distributed SaaS estates where ownership is unclear and identity data lives across multiple admin consoles because reconciliation depends on complete source-of-truth coverage.

Common Edge Cases That Create False Confidence

Tighter drift control often increases operational overhead, requiring organisations to balance faster cleanup against user friction and integration stability. That tradeoff is most visible when teams try to remove access that still supports a fragile workflow or a vendor-managed process.

One common edge case is the “shared but undocumented” account, where several teams depend on the same integration and nobody wants to claim ownership. Another is the temporary exception that was approved for a migration, then quietly left in place because the system kept working. There is also a growing SaaS pattern where an OAuth app appears legitimate but is no longer needed, which is why the lack of third-party visibility remains such a common failure mode in NHI programs. The Salesloft OAuth token breach is a reminder that identity drift is not just administrative debt, it can become an attack path.

Best practice is evolving toward continuous access assurance, but there is no universal standard for every SaaS platform yet. Teams should document what “normal” looks like for each identity class, then use policy-based reviews to catch deviations early. Where ownership is unclear, the safest default is to suspend, re-approve, or reissue access rather than let it persist indefinitely. Drift reduction works best when revocation is treated as a standard control, not a last-resort incident response step.

Related resources from NHI Mgmt Group

• How should security teams prioritise NHI remediation in cloud environments?
• How should security teams implement separation of duties in SaaS environments?
• How should security teams identify shadow data across cloud and SaaS environments?
• How should security teams govern non-human identities in cloud environments?