Top seven NHI risks are exposing enterprise access controls

At a glance

What this is: This is a Keeper Security analysis of the top seven NHI risk patterns, with overprivilege, improper offboarding and long-lived secrets emerging as the main controls gap.

Why it matters: It matters because NHI programmes fail when credentials outlive tasks, privileges exceed need and security teams cannot see the full machine identity estate.

Context

Non-human identities are machine, application and process identities that authenticate with API keys, tokens or certificates. The governance problem is not their existence, but the fact that they are often granted broad access, left active after use and tracked less rigorously than human accounts.

Keeper Security frames seven recurring failure patterns across the NHI lifecycle, from overprivilege and insecure authentication to secret leakage and long-lived credentials. That is a useful signal for IAM teams because the control failures are connected, not isolated: a leaked secret matters more when the identity is overprivileged and never offboarded.

Key questions

Q: What breaks when NHI credentials are overprivileged?

A: Overprivileged NHI credentials turn a single compromise into a larger access problem. Once attackers obtain the secret, they can often move laterally, reach higher-value systems and escalate privileges because the identity already carries more access than the task requires. The result is a wider blast radius and slower containment.

Q: Why do long-lived NHI secrets create disproportionate breach risk?

A: Long-lived secrets extend the time an attacker can reuse a stolen credential and make revocation harder after exposure. The risk grows when teams depend on manual rotation or legacy systems, because the credential stays valid long enough to become reusable across multiple systems and incidents.

Q: What are the signs that a third-party NHI offboarding process is failing?

A: A failing offboarding process usually shows up as unused integrations that remain active, unclear ownership for connected apps, and privileges that were never reviewed after deployment. Another warning sign is when IT cannot quickly identify which SaaS connections still touch critical systems. If teams only think about user offboarding, non-human access tends to persist unnoticed and expand the attack surface.

Q: How should security teams govern NHIs inside IAM programmes?

A: Security teams should treat NHIs as part of the main access estate, not as an afterthought to human IAM. That means inventorying service accounts, tokens, pipelines, and bots, then applying ownership, least privilege, lifecycle control, and revocation rules that match the risk of the systems they touch.

Technical breakdown

Why overprivileged NHIs expand blast radius

When a machine identity has more access than its task requires, compromise of that identity becomes a fast route to lateral movement and privilege escalation. The technical issue is not just excess permission volume, but the absence of task-scoped authorization boundaries. In NHI environments, credentials are often reusable across systems, so a single exposed key can become a bridge into multiple services. RBAC helps only when roles are narrow enough to reflect real workload function. JIT access matters because it collapses standing exposure into a shorter decision window.

Practical implication: map each NHI to a single task and remove persistent permissions that are not required for execution.

How secret leakage and long-lived credentials compound risk

Secret leakage turns code, logs, repositories and configuration files into credential distribution channels. The problem worsens when the exposed secret is long-lived, because the attacker does not need to race a short expiry window. In practice, a leaked API key or token becomes a durable authentication path unless it is rotated or revoked. This is why secrets management and rotation are not separate hygiene tasks. They are the same governance layer viewed at different stages of the credential lifecycle.

Practical implication: scan for hardcoded credentials, then enforce automatic rotation so any exposed secret has a short usable life.

Why offboarding failure creates hidden identity debt

Improper offboarding leaves service accounts and API keys active after the project, integration or owner relationship ends. Technically, that means the authentication object still exists even though the business reason for access has disappeared. These orphaned identities are hard to detect because they often look legitimate in logs. The control gap is lifecycle closure: creation is managed, but decommissioning is not. Once that gap exists, old machine identities become a stockpile of dormant access waiting to be rediscovered or abused.

Practical implication: tie every NHI to an owner, a purpose and an expiry condition so unused access can be removed on a schedule.

Threat narrative

Attacker objective: The attacker aims to turn a single exposed NHI credential into durable access across systems and data.

1. Entry occurs when attackers obtain exposed NHI credentials from hardcoded values, leaked repositories or forgotten service accounts.
2. Escalation follows when those credentials carry excessive permissions, allowing the attacker to move laterally and reach higher-value systems.
3. Impact comes from persistent access through long-lived secrets or unrevoked keys, which lets the attacker keep using the identity after the original exposure should have been closed.

Breaches seen in the wild

• iOS apps leaking hard-coded secrets: Cybernews found 71% of 156,080 iOS apps leak hard-coded secrets, with open cloud storage and Firebase databases exposing user data.
• 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 and download The State of NHI & AI Agent Breach Report 2026, covering 200+ breaches impacting Non-Human Identities including AI Agents.

NHI Mgmt Group analysis

Overprivilege is the NHI control failure that most directly widens blast radius. A machine identity does not need many permissions to do one job, but many enterprises still provision it as though future reuse were certain. That assumption is what turns a single compromise into a multi-system event. The discipline here is to treat task scope, not account convenience, as the governing unit of access.

Secret leakage and long-lived secrets are two sides of the same governance break. An exposed token is not only a disclosure event; it becomes a durable authentication path when the credential is not tightly bounded by time. That is why credential lifetime is not an operational detail, it is the security boundary. Practitioners need to think in terms of exposure window, not just storage location.

Improper offboarding creates identity debt that most review processes do not surface. When service accounts and API keys outlive the project or owner that justified them, they accumulate silent risk because the identity still authenticates even after accountability has disappeared. This is a lifecycle failure, and it should be treated as such: every unowned NHI is a residual access decision waiting to be exploited.

Third-party NHI exposure is now a supply chain governance problem, not just an access review problem. Vendor identities can widen the trusted perimeter faster than internal teams can inventory them, especially when monitoring is limited to initial onboarding. That means access assurance must extend across relationship changes, logging, and revocation, not stop at the contract boundary. The practitioner conclusion is simple: vendor trust without continuous NHI governance is incomplete trust.

Ephemeral credential trust debt: this article shows why organisations still rely on access patterns that assume credentials remain stable long enough to manage manually. Once secrets are short-lived, leaked, or automatically rotated, the old model of periodic review loses effectiveness unless issuance, scope and revocation are continuously governed. Teams should shift from reviewing identities after the fact to constraining them at the point of creation.

From our research library:

• 80% of identity breaches involved compromised non-human identities such as service accounts and API keys, according to the Ultimate Guide to NHIs.
• Only 20% have formal processes for offboarding and revoking API keys, and even fewer have procedures for rotating them, according to the Ultimate Guide to NHIs.
• Read next: Guide to NHI Rotation Challenges

What this signals

Ephemeral credential trust debt: many NHI programmes still rely on access models built for stable accounts, but machine identities are increasingly short-lived, distributed and hard to review after the fact. That creates a governance gap between issuance and oversight, which is where leaked keys and orphaned access become operational risk rather than theoretical exposure.

The strongest response pattern is to govern NHI access at issuance and decommissioning points, not only through periodic review. Once a service account or token can be created, copied and reused faster than it can be certified, the control model has already lost its timing advantage, and the identity estate becomes harder to bound than the human one.

For practitioners

• Enforce task-scoped least privilege Reduce every NHI to the minimum permissions required for a specific workload or integration, then remove broad roles that exist only for convenience.
• Automate NHI offboarding and expiry Attach an owner, purpose and expiry condition to each service account, API key and token so decommissioning happens when the use case ends.
• Scan code and pipelines for hardcoded secrets Search repositories, scripts and CI/CD configuration for embedded API keys, tokens and certificates, then block deployment until exposed credentials are remediated.
• Move to short-lived credentials Replace durable secrets with ephemeral access where possible so a leaked credential has a smaller reuse window and a lower blast radius.

Key takeaways

• NHI risk is not a single issue but a cluster of lifecycle and privilege failures that widen access paths.
• Keeper Security’s article points to recurrent patterns that make machine credentials easier to abuse than many teams assume.
• Practitioners need tighter ownership, shorter credential lifetimes and narrower permissions to contain NHI blast radius.

Key terms

• Non-Human Identity (NHI): A digital identity assigned to a non-human entity such as a software application, service account, API key, bot, machine, or AI agent that enables it to authenticate and interact with systems without direct human involvement. NHIs now outnumber human identities in most enterprises by 25 to 50 times.
• Secrets Leakage: Secrets leakage is the exposure of credentials such as API keys, tokens, or certificates in places where they can be discovered and reused. The risk is not just disclosure, but unauthorized authentication that turns a coding or pipeline mistake into active access.
• Overprivileged Nhi: An overprivileged NHI is a service account, token, key, or other machine identity that has been granted more access than it needs to do its job. The risk is not theoretical. Excess scope increases blast radius, makes compromise more valuable to attackers, and slows containment when the identity is abused.
• Offboarding: Offboarding is the controlled retirement of a workload, service account, token, certificate, or other non-human identity when it is no longer needed. It includes revoking credentials, removing permissions, and verifying that no residual trust path remains available to attackers.

Deepen your knowledge

NHI governance, agentic AI identity, and machine identity lifecycle 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 programme, it is worth exploring.