Least privilege for non-human identities is now a security baseline

At a glance

What this is: This is an analysis of why non-human identity sprawl and overprivilege are turning least privilege into a core governance requirement.

Why it matters: It matters because the same identity governance blind spots that weaken NHI programmes also complicate lifecycle control, entitlement review, and blast-radius reduction across human and autonomous environments.

By the numbers:

• 70% of organisations grant AI systems more access than they would give a human employee performing the exact same job.

👉 Read SecurEnds' analysis of non-human identity least privilege and governance

Context

Non-human identity sprawl is the operational problem behind this article. When APIs, service accounts, bots, and workload identities accumulate permissions faster than governance can track them, least privilege stops being a design principle and becomes an exception case.

The security issue is not that machine identities exist. It is that they often persist continuously, are owned inconsistently, and are granted access broadly enough to mask what they actually need. That creates a governance gap across NHI, IAM, and PAM programmes, especially in cloud-heavy environments.

SecurEnds frames machine identity governance as a way to restore control over entitlement scope, credential exposure, and review cycles. The underlying condition is typical in modern enterprises, which makes the controls described here broadly applicable rather than niche.

Key questions

Q: How should security teams govern non-human identities with standing privilege?

A: Start by assigning every NHI a clear owner, a declared business purpose, and a narrowly defined scope. Then remove unused entitlements, replace static secrets where possible, and force recurring access review for identities that can reach production systems. Standing privilege should be treated as a temporary exception, not a stable operating model.

Q: Why do long-lived machine credentials increase cloud security risk?

A: Long-lived credentials increase risk because compromise stays useful for longer and is harder to detect in time. If an API key, token, or service account remains valid across environments, the attacker can reuse it after the original leak. Short-lived access and automatic rotation reduce that persistence and make abuse less durable.

Q: What breaks when service accounts are not owned and reviewed?

A: Unowned service accounts become orphaned access paths that survive application changes, team turnover, and vendor transitions. Without ownership, no one is responsible for review, revocation, or scope reduction, so privilege accumulates silently. That creates the exact conditions needed for overprivilege, hidden exposure, and delayed detection.

Q: How do IAM teams reduce blast radius for APIs and pipelines?

A: Scope each identity to a single resource set or workflow, remove broad administrative permissions, and disable identities that are inactive. Add monitoring for unusual token use, privilege escalation, and cross-environment access. The goal is to make one compromised credential far less capable of moving laterally.

Technical breakdown

Why non-human identity sprawl becomes an access governance problem

Non-human identities are machine credentials that authenticate systems, workloads, and automation without a human in the loop. Their risk grows when they are created faster than ownership, scoping, and review can keep up. In practice, the problem is not just volume. It is that many identities are allowed to accumulate permissions as infrastructure changes, integrations multiply, and teams optimise for uptime over control. Once that happens, entitlement drift becomes normal, and least privilege is no longer enforced at the point of use.

Practical implication: inventory machine identities by owner, purpose, and privilege scope before entitlement drift becomes unmanageable.

Static secrets and long-lived tokens turn access into persistent exposure

Many NHIs rely on API keys, embedded credentials, and long-lived tokens that remain valid long after the original operational need has changed. That creates persistent exposure because compromise does not have to be immediate to be damaging. If a secret leaks in code, chat, logs, or a CI/CD workflow, the attacker may inherit access that lasts for months. Short-lived credentials, federated authentication, and automated rotation reduce that persistence, but only if they replace the default habit of leaving machine secrets in place.

Practical implication: replace static machine secrets with short-lived credentials and enforce automatic rotation where persistence is not operationally justified.

Why overprivileged machine identities expand blast radius in cloud and CI/CD

Overprivileged NHIs often have the access needed to move from one environment to another, manipulate cloud resources, or alter deployment pipelines. That is what makes them such effective paths for lateral movement and supply chain compromise. A credential that can deploy code, change infrastructure, or disable logging is not just an access token. It is a high-impact control point. The security failure is usually not one permission, but a stack of permissions that were never reduced when the system matured beyond its original design.

Practical implication: scope service accounts and pipeline identities to specific resources and remove any permission that is not required for the live workflow.

Threat narrative

Attacker objective: The attacker aims to turn a trusted machine identity into durable access that can be reused across systems with minimal detection.

1. Entry occurs when a static secret, hardcoded credential, or over-scoped token is exposed in a repository, pipeline, chat system, or workload configuration.
2. Escalation follows when that credential already carries standing privilege across cloud resources, APIs, deployment tools, or connected services.
3. Impact occurs when the attacker uses the trusted machine identity to alter infrastructure, exfiltrate data, suppress logging, or move laterally across environments.

Breaches seen in the wild

• Cisco DevHub NHI breach — IntelBroker exploited exposed Cisco credentials, API tokens and keys in DevHub.
• Schneider Electric credentials breach — exposed credentials gave attackers access to Schneider Electric Jira, exfiltrating 40GB.

Read our 52 NHI Breaches Analysis report for a comprehensive view of breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Least privilege for NHIs has become a governance baseline, not an optimisation goal. The article correctly frames machine identity access as a scaling problem, not a technical curiosity. When thousands of service accounts, APIs, and automation identities accumulate broad access, the issue becomes structural entitlement drift. The discipline required is closer to continuous governance than one-time hardening, and practitioners should treat excessive machine privilege as a core identity risk domain.

Standing credential exposure window: This article exposes a familiar failure mode in machine identity programmes, where static secrets and long-lived tokens outlive the operational need they were created for. That assumption was designed for credentials that would be rotated or retired before misuse mattered. It fails when the credential stays valid across months of infrastructure change, audit gaps, and environment sprawl. The implication is that access duration must be governed as tightly as access scope.

Machine identity ownership is a control, not a reporting convenience. The article’s emphasis on designated owners reflects an important governance truth. Without accountable ownership, service accounts and API tokens become orphaned entitlements that survive team changes, vendor transitions, and application rewrites. That is why NHI governance, IAM lifecycle discipline, and PAM oversight belong in the same control conversation. Practitioners should treat ownership as the prerequisite for every other machine identity control.

Continuous review matters because machine access failure is usually cumulative. The article links recurring entitlement analysis with reduced excess privilege, which matches what we see across real-world NHI compromise patterns. Broad access rarely appears all at once. It accumulates through exceptions, emergency grants, and inherited permissions. A mature programme therefore focuses on identifying where scope has drifted from operational necessity and on shrinking the blast radius before compromise turns into lateral movement.

Cloud governance and NHI governance are now inseparable. The article is strongest where it connects AWS, Azure, and Google Cloud controls to centralised visibility and entitlement management. That reflects the current state of enterprise identity: machine permissions are not isolated objects, they are embedded in cloud operating models. Practitioners should evaluate NHI risk as part of cloud governance maturity, not as a standalone secrets-management problem.

From our research:

• From our research: 64% of valid secrets leaked in 2022 are still valid and exploitable today, proving that detection alone is not enough without automated revocation. according to The State of Secrets Sprawl 2026.
• AI-related credential leaks surged 81.5% year-over-year in 2025, with the surrounding AI infrastructure leaking 5x faster than core LLM providers.
• The fastest path forward is to connect exposure detection to lifecycle controls, as outlined in Ultimate Guide to NHIs , Lifecycle Processes for Managing NHIs.

What this signals

The governance signal for practitioners is clear: machine identity management is moving from hygiene work to operational resilience. If service accounts, API keys, and pipeline identities are not tied to explicit owners and short-lived access patterns, recurring reviews will keep finding the same risk in different forms.

With 64% of valid secrets leaked in 2022 still exploitable today, per The State of Secrets Sprawl 2026, the programme lesson is that discovery without revocation does not reduce exposure. Teams should expect stronger pressure to unify secrets management, entitlement governance, and cloud access reviews under one control plane.

Machine identity blast radius: the practical measure is no longer how many NHIs exist, but how far one compromised credential can travel before containment. Organisations that cannot answer that question quickly will continue to overestimate the security of their automation estate.

For practitioners

• Inventory every machine identity with an accountable owner Create a live register of APIs, service accounts, bots, containers, and pipeline identities with purpose, owner, last-used date, and privilege scope. Orphaned identities should be treated as active risk until proven otherwise.
• Replace persistent credentials with short-lived access paths Use federated authentication, temporary tokens, and ephemeral credentials wherever a workload can support them. Reserve static secrets only for cases where no viable alternative exists, then make rotation automatic.
• Shrink resource scope to the minimum live workflow Remove wildcard permissions, broad admin roles, and inherited access from machine identities. Tie each entitlement to a single workload, environment, or pipeline stage so compromise cannot cross trust boundaries easily.
• Automate entitlement recertification and secret rotation Schedule recurring access reviews for service accounts and tokens, then pair them with enforced rotation and inactivity-based disablement. Review cadence should be short enough to catch drift before it becomes normalised.

Key takeaways

• Overprivileged machine identities create a governance problem because they turn everyday automation into persistent access risk.
• The evidence across industry research shows that leaked secrets and excessive permissions remain exploitable long after discovery, which makes revocation and review the decisive controls.
• Practitioners should focus on ownership, scope reduction, and automated lifecycle controls if they want NHI growth without proportional security debt.

Key terms

• Non-Human Identity: A non-human identity is a machine credential used by software, services, or automation to authenticate and act without a person present. In practice, this includes API keys, service accounts, tokens, certificates, and workloads that need scoped, governed access to infrastructure and data.
• Standing Privilege: Standing privilege is access that remains continuously available instead of being granted only when needed. For NHIs, it is especially risky because machine credentials can be reused at machine speed, often across multiple systems, if scope and lifecycle controls are not enforced.
• Credential Rotation: Credential rotation is the process of replacing secrets, keys, or tokens so that any exposed value becomes unusable. For machine identities, rotation only works when it is automated, tied to ownership, and paired with revocation of any lingering active credential paths.
• Entitlement Drift: Entitlement drift is the gradual expansion of access beyond what a workload actually requires. It happens when exceptions, inherited permissions, and infrastructure changes accumulate over time, leaving machine identities with broader access than their original purpose justifies.

Deepen your knowledge

NHI governance, agentic AI identity, machine identity security, IAM, human identity, identity lifecycle, secrets management, and workload identity are core topics in our NHI Foundation Level course, the industry's only accredited NHI security programme. If you are responsible for identity security strategy or governance in your organisation, it is worth exploring.

This post draws on content published by SecurEnds: least privilege for non-human identities and machine identity governance. Read the original.