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13 tools · 88 fixes · 22 incidents tracked · Updated Oct 13, 2026 · Sources: Supabase, GitHub, OWASP, Stripe + 9

Firebase

IDOR: reading or changing someone else's data in Firebase

criticalUpdated Oct 12, 2026

In rules, compare request.auth.uid to the owner field on the document. request.auth != null only proves the caller is signed in.

Fix for Firebase

In rules, compare request.auth.uid to the owner field on the document. request.auth != null only proves the caller is signed in.

The five-minute check, the other platforms, and the agent prompt are on the full guide. More Firebase fixes are on the Firebase page.