Ownership should sit with both procurement and the identity governance function, with security defining the access evidence required before approval. Procurement manages the contractual terms, while IAM or SaaS governance verifies that those terms are reflected in account lifecycle, data access, and renewal processes. If ownership is split without a shared workflow, controls become inconsistent.
Why This Matters for Security Teams
SaaS contracts often look like procurement paperwork, but they are really identity control documents. If a vendor can create admin paths, retain tokens after termination, or expand data sharing without a re-review, the contract has become part of the access model. That is why ownership has to span procurement and identity governance, with security defining the evidence required for approval and renewal.
The practical risk is not theoretical. NHIMG’s Ultimate Guide to NHIs notes that 80% of identity breaches involved compromised non-human identities such as service accounts and API keys, and only 20% of organisations have formal offboarding and revocation processes for API keys. For SaaS, that means contract terms must map to lifecycle controls, not just legal clauses. Current guidance in the NIST Cybersecurity Framework 2.0 supports tying governance to access management and continuous oversight, which is exactly where SaaS contracts tend to fail when ownership is fragmented.
In practice, many security teams encounter contract-driven identity drift only after renewal, acquisition, or a tenant access incident has already exposed the gap.
How It Works in Practice
Operational ownership works best when each function owns a distinct part of the control chain. Procurement owns the commercial terms, legal ensures those terms are enforceable, and identity governance verifies that the SaaS provider’s actual setup matches the promised controls. Security should specify the evidence required before signature, during onboarding, and at renewal, including admin role lists, SSO enforcement, SCIM provisioning, token revocation paths, and audit log availability.
A workable process usually includes:
- Contract language that requires SSO, MFA, SCIM, audit logs, and named offboarding timelines.
- A control checklist that maps each clause to an identity or access validation step.
- Periodic review of privileged SaaS roles, third-party integrations, and dormant accounts.
- Renewal gates that block extension until identity evidence is current.
This approach aligns with the governance direction in the NIST Cybersecurity Framework 2.0 and with the identity lifecycle emphasis in the Ultimate Guide to NHIs. For SaaS specifically, the control should also cover OAuth apps and API keys, because contract terms often mention user access while ignoring machine access paths. NHIMG’s 52 NHI Breaches Analysis is a reminder that these paths are where real compromise often starts.
These controls tend to break down when SaaS owners are decentralised across business units because no single team can prove that contractual commitments still match live tenant settings.
Common Variations and Edge Cases
Tighter contract-driven identity control often increases review time and slows vendor onboarding, so organisations have to balance faster purchasing against stronger assurance. That tradeoff becomes sharper for low-risk SaaS, where full security review can feel heavy, and for high-risk platforms, where minimal review is clearly insufficient.
Best practice is evolving on who should “own” the control register for third-party SaaS. Some organisations place it in procurement operations, others in SaaS governance, and mature programmes split it into contract ownership, technical validation, and ongoing attestations. There is no universal standard for this yet, but the evidence points in one direction: ownership should be shared, while accountability must be explicit.
Edge cases matter. A business-led app that uses a vendor’s built-in admin console may need stronger identity review than a simple subscription service. A vendor with federated SSO but weak API governance may satisfy procurement yet still leave a privileged path open. In those cases, the contract should require compensating controls and a named control owner for exceptions. NHIMG’s Top 10 NHI Issues and the NIST CSF both reinforce the same practical rule: document the control owner, validate the implementation, and re-check it at renewal rather than assuming the paper terms still hold.
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 CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| OWASP Non-Human Identity Top 10 | NHI-01 | SaaS contracts often govern non-human identities like API keys and service accounts. |
| NIST CSF 2.0 | PR.AC-4 | Contract-driven access terms must map to enforced least privilege and access oversight. |
| CSA MAESTRO | GOV-2 | Shared ownership and evidence-based approval fit agent and SaaS governance patterns. |
Require contract terms to define lifecycle, rotation, and revocation rules for SaaS non-human identities.
