Software Supply Chain and SBOM Security Questionnaire

An editable 19-page field guide for the moment a newly exploited dependency lands and you have to establish, from evidence, whether the vendor knows what is in the product and can tell you in time. Every item explains why it matters, the result a good answer should produce, the evidence to request, and the next analyst move.

What’s inside

• A readiness page confirming the vendor entity, product, environment, region and service in scope, business criticality and data sensitivity, the internal owners who can validate each claim, and how restricted evidence will be handled
• Forty-eight numbered items, SSC-01 to SSC-48, grouped into ten control domains
• Product Scope and Criticality, Governance and Supplier Accountability, Secure Development Lifecycle, and Source Code and Access
• Open-Source and Dependency Management, Build Pipeline and Environment, and Artifact and Release Integrity
• SBOM Creation and Quality, Vulnerability and VEX Management, and Customer Delivery and Incident Response
• Response, evidence reference, action owner and due date against every item, so the completed form is the assessment record rather than a questionnaire you transcribe later

The assessment rule is written into the form: evidence should be current, complete for the service in scope, usable by your organization, tested where capability matters, and linked to a decision. A certificate, policy, screenshot or vendor statement is not enough on its own when it does not prove the specific requirement.