They should treat every unsanctioned SaaS purchase as both a spend exception and an identity exception. The first response is to identify the business owner, the connected identities, and any API keys or integrations already in use. Without that mapping, the organisation cannot safely decide whether to approve, constrain, or retire the tool.
Why This Matters for Security Teams
Unsanctioned SaaS is rarely just a procurement problem. Once a business user signs up with a corporate mailbox, the tool often becomes an identity hub with OAuth grants, API keys, delegated admin access, and data flows that bypass formal review. That creates hidden access paths, unclear ownership, and weak offboarding. NHI Management Group’s Ultimate Guide to NHIs notes that 92% of organisations expose NHIs to third parties, which is exactly the kind of exposure that unmanaged SaaS can amplify.
Procurement teams need to govern these purchases as both financial commitments and access-risk events. If a tool can read mail, sync files, call webhooks, or trigger automation, it is now operating inside the organisation’s identity plane. Security teams should align intake, contract review, and identity review so that approval is conditional on owner mapping, least privilege, and revocation paths. The governance bar should be informed by NIST Cybersecurity Framework 2.0, not informal convenience. In practice, many security teams discover the tool only after OAuth consent, shadow integrations, or stale API keys have already created persistent access.
How It Works in Practice
The practical response is to build a procurement-to-identity workflow that treats every unsanctioned SaaS purchase as a triage case. First, identify who requested the tool, which department is funding it, and which identities are already connected. Then inventory all machine access: user tokens, service accounts, API keys, SCIM links, mailbox permissions, and webhook endpoints. NHI Management Group’s Lifecycle Processes for Managing NHIs is a useful reference point here because the same lifecycle logic applies even when the purchase originated outside procurement.
- Confirm the business owner and the operational owner are both named.
- Classify every connected identity as human, service, or integration.
- Revoke or constrain excessive permissions before allowing continued use.
- Require secrets to be vaulted, rotated, and tied to a documented offboarding path.
- Record whether the SaaS vendor supports SSO, SCIM, audit logs, and tenant-level admin controls.
Security and procurement should use contract terms to force lifecycle hygiene: the right to disable integrations, attestations for data handling, and notification of material changes to auth models. For control design, NIST SP 800-53 Rev 5 Security and Privacy Controls helps translate the review into enforceable access, audit, and configuration requirements. These controls tend to break down when business units can reauthorize apps without central logging because the identity trail becomes fragmented across multiple tenants and administrators.
Common Variations and Edge Cases
Tighter procurement control often increases cycle time, so organisations have to balance speed against the cost of unmanaged access. That tradeoff is most visible when teams buy small SaaS tools on cards, during pilots, or through marketplaces that bypass central onboarding.
There is no universal standard for this yet, but current guidance suggests treating low-cost tools with the same identity scrutiny as larger contracts if they can reach corporate data. A lightweight exception process may be acceptable for read-only tools, but anything that can send mail, create records, or invoke automation should undergo full review. The same rule applies when the vendor says “no credentials stored” but the integration still uses OAuth refresh tokens or delegated admin scopes.
One useful benchmark from NHI Management Group is that only 20% of organisations have formal processes for offboarding and revoking API keys, and even fewer rotate them consistently. That makes SaaS offboarding a high-risk gap, not an administrative afterthought. See also the Top 10 NHI Issues and Regulatory and Audit Perspectives for how audit expectations increasingly follow identity evidence, not just spend approvals.
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, OWASP Agentic AI Top 10 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | Unsanctioned SaaS often introduces unmanaged NHIs and hidden integrations. |
| OWASP Agentic AI Top 10 | SaaS automations can behave like tools with autonomous execution paths. | |
| CSA MAESTRO | Agent-like SaaS workflows need governance over tools, access, and runtime behavior. | |
| NIST CSF 2.0 | ID.AM | Asset and identity discovery is essential for shadow SaaS governance. |
| NIST AI RMF | GOVERN | Governance is needed for AI-enabled SaaS and delegated automation risk. |
Assign accountability, risk ownership, and monitoring for all AI-capable SaaS used outside official channels.
Related resources from NHI Mgmt Group
- How should security teams govern SaaS apps that are outside formal approval channels?
- How should teams govern AI consumption when spend is spread across multiple tools?
- How should organisations govern eDiscovery access in Google Workspace and other SaaS tools?
- How should teams govern AI tools that participate in recovery workflows?
Deepen Your Knowledge
Reviewed and updated by the NHIMG editorial team on July 9, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org
