The accumulation of applications, service accounts, tokens, and AI agent identities that sit outside the identity platform’s control. It creates a split estate where some access is reviewed and revoked, while other access persists without lifecycle discipline.
Expanded Definition
Ungoverned identity sprawl describes the uncontrolled growth of machine identities across applications, pipelines, scripts, workloads, and AI agents when those identities are not consistently enrolled in the identity platform. In practice, the issue is not just volume. It is the split between governed identities that follow lifecycle controls and shadow identities that do not.
In NHI security, this term is closely tied to missing inventory, inconsistent ownership, weak offboarding, and fragmented secret handling. A service account in a directory, a token embedded in a CI job, and an agent credential issued for tool use may all represent the same access risk, yet they are often managed through different teams and different processes. Definitions vary across vendors on whether temporary tokens and agent-issued credentials are counted as identities, but the operational concern is the same: access exists without reliable review, expiry, or revocation discipline. The most common misapplication is treating identity sprawl as a simple account-count problem, which occurs when organisations ignore unmanaged tokens, dormant integrations, and AI agent credentials outside the authoritative identity system.
For broader governance context, see the NIST Cybersecurity Framework 2.0 and NHIMG’s Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs.
Examples and Use Cases
Implementing identity governance rigorously often introduces inventory and ownership overhead, requiring organisations to weigh stronger control against the effort needed to continuously discover, classify, and retire machine identities.
- A DevOps team creates short-lived pipeline tokens, but the tokens are never tracked in the identity platform, so old credentials continue to work after the pipeline is retired.
- An AI agent receives tool access for support workflows, then accumulates new permissions through ad hoc integrations without a review path for its original owner.
- A third-party application uses service accounts across multiple tenants, yet deprovisioning only removes the application record and not the underlying credentials.
- Security teams discover that secrets are stored in code and collaboration tools, a pattern reflected in NHIMG’s Ultimate Guide to NHIs and reinforced by NHI breach analyses such as the 52 NHI Breaches Analysis.
- Cloud teams federate workloads through service identities, but no single system records who approved the credential, when it expires, or which workloads still use it.
From a standards perspective, lifecycle discipline should align with the identity assurance and access governance principles in the NIST Cybersecurity Framework 2.0, even where implementation details differ across platforms.
Why It Matters in NHI Security
Ungoverned Identity Sprawl creates blind spots that attackers can exploit long after a project, vendor relationship, or automation path should have ended. When identities are outside central control, revocation becomes partial, evidence collection becomes unreliable, and access review programs give a false sense of completeness. NHIMG reports that only 5.7% of organisations have full visibility into their service accounts, which shows how easily untracked access can persist at scale.
This matters because unmanaged machine identities are not a niche exception. They are often the primary path for overprivilege, lateral movement, and supply chain exposure. NHIs are also widely overrepresented in modern environments, and that growth is accelerating as AI agents and integration platforms multiply credential demand. In governance terms, sprawl weakens Zero Trust because trust decisions depend on knowing what exists, who owns it, and whether it should still be active. The Ultimate Guide to NHIs — Regulatory and Audit Perspectives and the Ultimate Guide to NHIs — Key Challenges and Risks both show why auditability depends on lifecycle control, not just cataloging.
Organisations typically encounter the real cost of identity sprawl only after a breach, token leak, or failed offboarding event, at which point ungoverned access becomes operationally unavoidable to address.
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 and OWASP Agentic AI Top 10 address the attack and risk surface, while NIST CSF 2.0, NIST Zero Trust (SP 800-207) and NIST SP 800-63 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Covers discovery and inventory gaps that allow unmanaged NHI sprawl. |
| NIST CSF 2.0 | ID.AM-1 | Asset management requires knowing what identities exist and where they live. |
| NIST Zero Trust (SP 800-207) | Zero Trust depends on verifying every identity before granting access. | |
| NIST SP 800-63 | AAL2 | Assurance concepts help define how strongly a credential is bound and managed. |
| OWASP Agentic AI Top 10 | AGENT-04 | Agentic systems introduce new identities that can sprawl beyond oversight. |
Apply equivalent assurance and governance to machine credentials based on their privilege and exposure.
