Original Summary

Hey founders and devs, A multi-tenant data leak is the fastest way to kill a B2B SaaS company's reputation. Yet, most teams rely on standard unit tests that only verify happy paths rather than actively trying to breach tenant boundaries. Before launching our B2B stack, we wrote an 8-point adversarial test runner to stress-test our Postgres RLS and Next.js backend setup. Here are the 8 failure modes every multi-tenant SaaS needs to test for: Cross-tenant reads/writes via direct ID manipulation (IDOR) Stale JWT claims retaining access after org membership revocation Un-isolated background worker processes running on elevated service keys Postgres views bypassing table-level RLS policies Stripe webhook replay attacks and race conditions Expired API key execution across workspace endpoints Schema fuzzing/malformed payload handling in webhooks Concurrent role escalation during active user sessions Catching these at the database layer before shipping gives you complete confidence that even if an app-level bug occurs, the database engine enforces tenant boundaries. What does your team's security/isolation check look like before going live?   submitted by   /u/Pale_Ferret_8241 [link]   [comments]

  • 情报分类：开源项目与落地
  • 分类依据：内容涉及项目实践、创业、副业或变现
  • 信息来源：Reddit · SaaS
  • 发布时间：2026/10/5 23:08:58