They create IAM risk because each unmanaged application introduces another identity system, another set of privileges, and another place where access can persist after need changes. Without central visibility, teams cannot reliably enforce least privilege, review entitlements, or revoke access consistently across the SaaS estate.
Why This Matters for Security Teams
saas sprawl and shadow IT turn identity into a moving target. Every unsanctioned app, integration, and browser extension can introduce its own authentication model, its own token lifecycle, and its own privileged service accounts. That fragments visibility and makes it harder to enforce least privilege, review access on schedule, or revoke permissions when staff change roles or leave.
For security teams, the real risk is not just extra applications. It is the loss of a reliable inventory of who or what can reach sensitive data. NHI Management Group’s Ultimate Guide to NHIs — Key Challenges and Risks and the NIST Cybersecurity Framework 2.0 both point toward the same operational reality: visibility, asset inventory, and access governance have to extend across the whole estate, not just the sanctioned core.
In practice, many security teams discover shadow access only after a breach review, not through an intentional control check.
How It Works in Practice
When SaaS adoption outpaces governance, access control becomes distributed across dozens of consoles, support portals, and API layers. That means the same person may hold a corporate SSO account, an app-local admin role, and a long-lived API token in a separate tool. Shadow IT makes this worse because the app often bypasses central onboarding, so it never enters the normal joiner, mover, leaver workflow.
A practical response starts with discovery and then shifts to control normalization. Security teams typically need to:
- Inventory approved and unapproved SaaS, including OAuth grants, service accounts, and machine-to-machine integrations.
- Map each app to an owner, data classification, and authentication method.
- Enforce SSO where possible, with conditional access and MFA on every externally reachable identity system.
- Replace static shared secrets with short-lived credentials or delegated tokens where the platform supports it.
- Review stale entitlements, dormant accounts, and third-party app grants on a recurring schedule.
For non-human access, the breach patterns documented in Salesloft OAuth token breach and BeyondTrust API key breach show why long-lived tokens in unmanaged SaaS are especially dangerous: they are easy to forget, hard to rotate consistently, and frequently over-scoped. The OWASP guidance on identity and access issues, together with current NIST practice, supports moving toward centralized policy, continuous review, and tighter token hygiene.
These controls tend to break down when business units can create new SaaS tenants without security review, because the identity team never sees the new authentication surface.
Common Variations and Edge Cases
Tighter SaaS governance often increases friction for teams that rely on fast procurement, so organisations have to balance speed against control. That tradeoff is real, especially in startups, mergers, and product-led engineering groups where new tools appear faster than the security catalogue can absorb them.
Best practice is evolving, but current guidance suggests treating shadow IT as an identity problem first and a software inventory problem second. A tool that stores customer data, even if it is “just” a collaboration app, can create the same IAM exposure as a core production system if it accepts delegated OAuth access or admin delegation. The Top 10 NHI Issues highlights how unmanaged tokens, orphaned service identities, and inconsistent secret handling become systemic risks once SaaS sprawl spreads across teams.
There is no universal standard for this yet, but mature programs usually separate sanctioned SaaS from tolerated exceptions, require periodic reapproval for both, and block high-risk integrations until ownership is explicit. That approach matters most for environments with many third-party extensions or business-managed automations, where an unreviewed integration can silently inherit access to email, files, CRM data, and workflows.
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 CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | ID.AM-1 | SaaS sprawl is fundamentally an asset inventory problem. |
| NIST CSF 2.0 | PR.AC-1 | Shadow IT creates unmanaged access paths that bypass governance. |
| OWASP Non-Human Identity Top 10 | NHI-03 | Stale tokens and credentials are common in unmanaged SaaS. |
Maintain a current inventory of SaaS apps, identities, and integrations before granting or reviewing access.
Related resources from NHI Mgmt Group
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on June 11, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
