Why do orphaned non-human identities create more risk than many teams expect?

Why This Matters for Security Teams

Orphaned non-human identities are not just leftover accounts. They are durable access paths that often keep working long after the human owner has moved on, changed roles, or left the organisation. That makes them especially dangerous in environments where service accounts, API keys, and automation tokens are treated as infrastructure rather than identities. NHI Management Group’s Ultimate Guide to NHIs notes that only 20% of organisations have formal offboarding and API key revocation processes, while NIST Cybersecurity Framework 2.0 continues to emphasise asset visibility and access governance as core risk controls.

The practical issue is not simply that the credential exists. It is that no one may still be accountable for it, no one may be monitoring its use, and no lifecycle event triggers revocation. That combination turns an ordinary forgotten secret into a quiet persistence mechanism. In practice, many security teams encounter orphaned NHIs only after a breach review, not through intentional offboarding controls.

How It Works in Practice

Orphaning usually starts with a normal business change: a developer departs, a vendor relationship ends, a CI/CD pipeline is retired, or a workload is rebuilt under a new owner. If the NHI is not tied to a current owner, expiry policy, or automated inventory record, it survives the change. Because machine identities often have broad API access and are trusted by downstream systems, they can remain useful long after a human would have been disabled.

This is why current guidance treats lifecycle management as a security control, not an administrative task. The strongest programmes pair inventory, ownership, and revocation so that every NHI has a named custodian, an expiry or review date, and a clear offboarding workflow. The Top 10 NHI Issues research highlights how frequently organisations miss these basics, while the Ultimate Guide to NHIs — Key Challenges and Risks explains why visibility gaps make remediation slow and incomplete.

• Map each NHI to a business owner, technical owner, and expiry or review schedule.
• Link identity lifecycle to HR offboarding, vendor termination, and pipeline decommissioning events.
• Use secrets managers and rotation policies so stale credentials do not linger in code, configs, or CI/CD systems.
• Log and review machine authentication just as you would privileged human access.

Automated discovery, least privilege, and short-lived secrets reduce the chance that a forgotten identity can be reused for lateral movement or persistence. These controls tend to break down in highly distributed SaaS and CI/CD environments because ownership metadata is incomplete and credentials are duplicated across too many systems.

Common Variations and Edge Cases

Tighter NHI lifecycle control often increases operational overhead, requiring organisations to balance stronger revocation discipline against delivery speed and platform complexity. That tradeoff becomes more visible in microservices, shared platform accounts, and third-party integrations, where one identity may support multiple applications or teams.

Best practice is evolving, but there is no universal standard for every orphaning scenario yet. Some teams rely on periodic access reviews, while others prefer event-driven deprovisioning tied to source-of-truth systems. The right answer depends on how quickly credentials can be rotated and how much blast radius a single identity has. If an NHI is embedded in production automation, instant deletion may cause outages, so a staged disable-and-observe process can be safer than abrupt removal.

Orphaning risk also appears in less obvious places, including contractor accounts, shared service principals, and tokens created for temporary investigations. The breach pattern behind JetBrains GitHub plugin token exposure shows how exposed machine credentials can persist beyond the event that created them. The key question is not whether the identity was once legitimate, but whether it still has a current owner, a current purpose, and a current expiry. Without all three, the identity is effectively abandoned.

Related resources from NHI Mgmt Group

• Why do non-human identities create more IAM risk than many teams expect?
• Why does standing access create more risk in non-human identities than many teams expect?
• Why do non-employee identities create more access risk in healthcare environments than many teams expect?
• Why do OAuth integrations and non-human identities create more SaaS risk than many organisations expect?