SSO covers federated applications and PAM covers elevated access, but credential sprawl lives in the unmanaged middle. Employees can create separate logins for SaaS and AI tools, often with work email and unmanaged passwords. Those accounts may be business critical, yet they sit outside the controls that IAM teams usually measure.
Why This Matters for Security Teams
SSO and PAM are necessary controls, but they do not close the full identity surface. SSO usually governs federated applications, while PAM focuses on elevated or administrative access. credential sprawl grows in the gap between those systems: SaaS logins, developer tools, AI services, and one-off integrations that are created outside central oversight. That unmanaged middle is where business-critical accounts accumulate with weak recovery paths, inconsistent MFA, and no lifecycle ownership.
NHIMG research on the Guide to the Secret Sprawl Challenge shows how secrets and credentials escape normal governance through everyday workflows, not just major failures. That risk is consistent with the control gap highlighted in the OWASP Non-Human Identity Top 10, where unmanaged identity artifacts remain a primary attack path. The practical issue is not that SSO and PAM are ineffective, but that they were never designed to discover and govern every account created around them. In practice, many security teams encounter credential sprawl only after a SaaS compromise, token leak, or dormant account takeover has already occurred, rather than through intentional identity inventory.
How It Works in Practice
Credential sprawl persists because users and engineers keep creating identities in the workflow path of least resistance. A team may use SSO for core apps, then add separate logins for a marketing platform, an AI assistant, a code repository, or a partner portal. PAM may protect privileged admin access, but it does not automatically govern standard SaaS accounts, service-to-service tokens, or the credentials embedded in scripts and automation. The result is a broad unmanaged layer that is invisible to classic access review processes.
Current guidance suggests treating this as an identity discovery and lifecycle problem, not only a login problem. Security teams should identify all external accounts tied to corporate email, map them to an owner, and classify which accounts can be brought under SSO, which require stronger authentication, and which should be eliminated. For non-human identities, the preferred direction is dynamic, short-lived credentials rather than static secrets. That means JIT issuance, automatic revocation, and workload identity patterns for machines and agents, rather than passwords that persist for months. The operational model is reinforced by the Ultimate Guide to NHIs — Static vs Dynamic Secrets, which aligns with the broader least-privilege direction in the NIST SP 800-63 Digital Identity Guidelines.
- Discover accounts created outside the IAM catalogue, including SaaS, AI tools, and partner systems.
- Assign an owner and business purpose to each account, then remove anything that lacks a clear justification.
- Prefer SSO where possible, but do not assume SSO enrollment eliminates local credentials or recovery paths.
- Use PAM for privileged actions, while separately governing non-admin credentials, tokens, and API keys.
- Replace static secrets with ephemeral, task-scoped credentials wherever automation is involved.
These controls tend to break down in fast-moving engineering environments where teams can self-provision cloud services, create API access on demand, and connect AI tools without central approval because the account creation rate outpaces inventory and review.
Common Variations and Edge Cases
Tighter identity governance often increases friction for business teams, so organisations must balance user convenience against the cost of uncontrolled account growth. Best practice is evolving here: there is no universal standard for exactly how much SaaS or AI sprawl can be tolerated, but there is broad agreement that invisible credentials are a risk regardless of where they sit.
One common edge case is a “shadow SSO” pattern, where users sign in with corporate email but the underlying service still keeps its own password, recovery email, or long-lived API token. Another is delegated access created for vendors, contractors, or temporary projects, where the account looks low-risk until it is reused, shared, or forgotten. Agentic and automation-heavy environments are even harder: a single workflow can chain multiple tools, cache tokens, and leave standing access behind unless lifecycle controls are explicit. The practical response is to treat every identity, human or non-human, as having an owner, a scope, and an expiry. Security programmes that stop at federated login coverage often miss the very accounts that attackers prefer because they are business critical and least monitored. NHIMG’s reporting on The 2024 Non-Human Identity Security Report underscores that this maturity gap remains widespread, especially where access management has not yet caught up with automation and AI usage.
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 address the attack and risk surface, while NIST CSF 2.0 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 | Credential sprawl starts with unmanaged identity inventory and discovery gaps. |
| NIST CSF 2.0 | PR.AA-1 | Identity and authentication coverage maps to controlling access across the full environment. |
| NIST SP 800-63 | Digital identity assurance informs how accounts should be authenticated and lifecycle-managed. |
Apply stronger identity proofing and authentication where corporate accounts still rely on local credentials.
