TL;DR: Machine identities now outnumber human identities by over 45:1 in many enterprises, and unmanaged credentials can drive privilege escalation, data exfiltration, and supply chain compromise, according to Oasis Security. Lifecycle control, not visibility alone, now determines whether machine identity risk stays contained.
At a glance
What this is: This article argues that machine identity governance depends on controlling issuance, rotation, and revocation across certificates, API keys, tokens, and service accounts.
Why it matters: It matters because IAM, PAM, and NHI programmes cannot contain machine-to-machine access risk if credentials outlive their intended use or remain overprivileged.
By the numbers:
- Machine identities now outnumber human identities by over 45:1 in many enterprises.
Context
Machine identity governance is the discipline of controlling digital credentials used by software entities, not people. In practice, that means managing certificates, API keys, OAuth tokens, and service account credentials across cloud, hybrid, and on-premises environments.
The governance gap is lifecycle control. Organisations often discover machine identities, but discovery alone does not stop overprivileged, orphaned, or stale credentials from being reused after the intended workload, pipeline, or device has changed. The article's core point is that machine identity risk now sits inside broader NHI and IAM programmes, not outside them.
Key questions
Q: What breaks when machine identities have no clear owner?
A: When machine identities have no clear owner, offboarding, remediation, and accountability all fail together. Credentials may still be logged, but no one is responsible for validating purpose, reducing scope, or revoking access when the system changes. That creates governance debt and makes incident response slower and less reliable.
Q: Why do long-lived machine credentials increase breach risk?
A: Long-lived credentials create a standing access path that can survive code changes, personnel changes, and forgotten integrations. Once exposed, they can be replayed for as long as they remain valid. That makes them more dangerous than narrowly scoped, short-lived credentials because the attacker has more time to find, test, and abuse them.
Q: How do teams know if machine identity governance is actually working?
A: Look for evidence that each service account has a current owner, a narrow purpose, a short credential lifetime, and a clear retirement path. If any of those are missing, the programme may appear controlled on paper while still leaving durable access paths in production.
Q: What is the difference between machine identity inventory and lifecycle control?
A: Inventory tells you what machine identities exist. Lifecycle control decides whether they should still exist, whether they are still valid, and whether their permissions still match the workload they serve. Organisations need both, but only lifecycle control prevents stale credentials from becoming standing access.
Technical breakdown
Why machine credentials behave differently from human credentials
Machine identities authenticate software-to-software interactions, so the credential is usually embedded in code, infrastructure, or runtime automation rather than memorised by a user. That changes the control problem: passwords and MFA-centric human flows do not govern certificate chains, token scopes, service account entitlements, or automated renewal paths. The real issue is that machines can keep using a credential long after the owning workload, pipeline, or integration has shifted. In Zero Trust terms, trust must be continuously re-established for the identity object itself, not assumed because a system was once approved.
Practical implication: model machine credentials as governed assets with explicit issuance, scope, rotation, and revocation rules.
How lifecycle control reduces machine identity blast radius
Lifecycle control ties each machine identity to a defined purpose, owner, and expiry path. When issuance, rotation, and revocation are managed together, credentials are less likely to persist after a workload is retired or a vendor relationship changes. That is materially different from inventory alone, because inventory tells you what exists while lifecycle control determines whether it can still be used. For NHIs, the failure mode is persistence without accountability: orphaned credentials, unused service accounts, and stale certificates create standing access that attackers can exploit.
Practical implication: connect inventory to ownership and expiry so stale machine identities are removed before they become standing access.
Why automation is becoming part of machine identity governance
The article points to automation as a response to scale, and that is the right direction for machine identity governance. As environments add cloud services, CI/CD systems, and IoT devices, manual review cannot keep pace with credential issuance and renewal. Automation matters most where short-lived credentials, policy-based issuance, and real-time revocation can shrink the time a secret remains usable. Standards such as SPIFFE/SPIRE and NIST SP 800-207 matter here because they help shift trust away from long-lived secrets and toward verifiable workload identity and continuous authorization.
Practical implication: automate rotation and revocation for machine identities whose operational lifespan is shorter than your review cycle.
Threat narrative
Attacker objective: The objective is to turn a machine credential into durable access that can be used to move laterally, extract data, or manipulate dependent systems.
- Entry typically begins when a machine credential such as an API key, token, or certificate is exposed, orphaned, or reused beyond its intended scope.
- Escalation follows when the credential carries excessive privileges, allowing the attacker or abused workflow to move from one system to adjacent services or data stores.
- Impact is reached when the machine identity enables unauthorized access, data exfiltration, or supply chain abuse across the connected environment.
Breaches seen in the wild
- Dropbox Sign breach 2024: A compromised back-end service account gave attackers Dropbox Sign customer data, including API keys, OAuth tokens and MFA information.
- OneLogin API flaw (CVE-2025-59363): A OneLogin API flaw exposed OIDC client secrets to anyone with an API key, including vendors (CVE-2025-59363); fixed with no customer impact.
Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.
NHI Mgmt Group analysis
Machine identity governance has become a lifecycle problem, not a discovery problem. Knowing where machine identities exist does not tell you whether they are still valid, scoped correctly, or tied to an accountable owner. The article's central shift is that issuance, rotation, and revocation now matter more than simple visibility. Practitioners should treat lifecycle state as the real control boundary.
Orphaned and overprivileged machine identities are standing access in disguise. A certificate, API key, or service account that outlives its workload behaves like a privileged account with no user at the keyboard. That is why machine identity failures often surface as privilege escalation or data exfiltration rather than simple authentication issues. The governance conclusion is straightforward: unused access is still access.
Ephemeral trust debt: Long-lived machine credentials accumulate risk because they are granted for one operational purpose but remain reusable long after that purpose has changed. That debt compounds in DevOps, cloud, and IoT environments where service relationships evolve faster than review processes. The practical implication is that machine identity programmes need expiry-aware governance, not static approval records.
Zero Trust architectures depend on machine identity revocation discipline. If a workload, pipeline, or device can keep authenticating after it should have been retired, Zero Trust becomes descriptive rather than enforceable. This is why lifecycle control is not a side topic in machine identity governance. It is the mechanism that keeps continuous verification credible.
Machine identity controls now sit at the intersection of IAM, PAM, and NHI governance. The article shows that machine credentials are no longer a niche infrastructure concern. They shape how organisations enforce least privilege, segment services, and prove compliance across hybrid estates. Practitioners should align machine identity governance with the same accountability model used for other privileged identities.
From our research library:
- NHIs outnumber human identities by 25x to 50x in modern enterprises, according to the Ultimate Guide to NHIs.
- Read next: Guide to NHI Rotation Challenges
What this signals
Ephemeral trust debt: Machine identity programmes fail when credentials are treated as permanent assets in environments that change by the hour. The governance move is to shorten credential lifespan until it matches the operational life of the workload, pipeline, or device.
Lifecycle thinking matters more than another discovery pass because credential sprawl is only dangerous when access outlives purpose. Teams should watch for revocation lag, unmanaged service accounts, and certificates that persist beyond the system that requested them.
For practitioners
- Define machine identity ownership Assign every certificate, token, API key, and service account to a human owner and an application owner so revocation has a decision point.
- Enforce expiry and rotation policy Set maximum lifetimes for machine credentials and rotate them on a schedule that matches workload change, not calendar convenience.
- Revoke dormant and orphaned credentials Continuously identify machine identities that no longer map to active workloads, pipelines, vendors, or devices and remove their access.
- Scope privileges to the smallest usable function Reduce service account and token entitlements so a compromised machine identity cannot traverse unrelated systems or data stores.
- Automate certificate and token lifecycle events Use policy-driven issuance, renewal, and revocation for environments where manual handling cannot keep pace with machine scale.
Key takeaways
- Machine identity risk is mainly a governance problem because credentials can outlive the workloads, pipelines, and integrations they were created for.
- The scale of the problem is already material, with machine identities outnumbering human identities by over 45:1 in many enterprises.
- Lifecycle discipline, especially ownership, rotation, and revocation, is the control that contains blast radius when machine credentials are exposed or overprivileged.
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 addresses the attack and risk surface, while NIST SP 800-53 Rev 5, 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 — Improper Offboarding | The article centres on revocation and retirement of machine credentials after workloads change. |
| NHI-05 — Overprivileged NHI | The article warns that machine identities with excess privilege amplify breach impact. | |
| NHI-07 — Long-Lived Secrets | Long-lived certificates, keys, and tokens are the article's core governance problem. | |
| Recommendation — Map machine credential offboarding to NHI-01 and remove access when the owning workload ends. Apply NHI-05 to trim service account and token scope to the minimum required function. Use NHI-07 to shorten machine credential lifetimes and eliminate stale secrets. | ||
| NIST SP 800-53 Rev 5 | IA-5 — Authenticator Management | Credential rotation and revocation for machine identities align directly to authenticator management. |
| Recommendation — Apply IA-5 to govern rotation, revocation, and replacement of machine authenticators. | ||
| NIST CSF 2.0 | PR.AA-05 — Access Permissions, Entitlements and Authorizations | The article focuses on ensuring machine identities keep only the access they still need. |
| Recommendation — Use PR.AA-05 to review and narrow machine identity permissions as workloads change. | ||
| NIST Zero Trust (SP 800-207) | continuous verification — Continuous Verification | The article links lifecycle control to maintaining Zero Trust for machine-to-machine access. |
| Recommendation — Design machine identity controls for continuous verification instead of permanent trust. | ||
Key terms
- Machine Identity: The digital identity of a machine, device, or workload, such as a server, container, or VM, used to authenticate it within a network. Sometimes used interchangeably with NHI, though NHI is the broader category.
- Lifecycle Control: Lifecycle control is the set of processes that govern access from onboarding through change and removal. In identity programmes, it ensures that provisioning, review, and offboarding stay aligned as applications and permissions evolve. A connector that cannot support lifecycle control may sync data, but it does not fully govern access.
- Orphaned Credential: A secret, token, or service account password that remains active and valid after the NHI it was issued to has been decommissioned, or after the person or system responsible for it has left the organisation.
- Blast Radius: The potential scope of damage if a specific credential or identity is compromised. Identities with broad permissions have a larger blast radius and represent a higher priority for least-privilege enforcement and security controls.
Deepen your knowledge
NHI governance, machine identity security, and identity lifecycle management are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are building or maturing an IAM or NHI governance programme, it is worth exploring.
Published by the NHIMG editorial team on May 31, 2026.
Updated on October 6, 2026.
NHI Mgmt Group, the independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org