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sensitive dataSupabaseSaaS

Supabase multi-tenant: the data-separation checklist

Published on 2026-04-166 min readCleanIssue

> TL;DR: What to review in a product built on Supabase: RLS policies, organization scope, document storage, and role logic.

A Supabase product can move fast, but not without discipline

The real subject is not only enabling RLS. It is checking whether separation still holds across company scope, roles, manager boundaries, and document flows.

For more — see our application security offer.

Short checklist

  • RLS policies on all sensitive tables;
  • manager scope limited to the real perimeter;
  • document storage protected coherently;
  • exports bounded per organization;
  • admin and back-office access kept tight.
  • For software vendors

    CleanIssue specializes in security reviews for software handling sensitive data. If you're building a product, payroll tool, or ATS and want an external review of your exposure before a client audit or security questionnaire, see our offer for software vendors.

    Key Takeaways

  • Identify and test your exposed attack surfaces before a third party does.
  • Client-side security controls never replace server-side validation.
  • Regular audits are more effective than one-time checks — vulnerabilities appear with every deployment.
  • Building software? CleanIssue performs security audits for your product in real-world conditions, no source code access needed. For a first read of your exposure, start with an external review of your application.

    Sources

    Written by CleanIssue
    Reviewed on 2026-04-16

    Editorial analysis based on official vendor, project, and regulator documentation.

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