Supabase Security Audit
Independent security assessment focused on protecting customer data in Supabase-based SaaS applications. We review authentication, authorization, Row Level Security (RLS), tenant isolation, service-role usage, API security, Edge Functions, storage access controls, and database permissions to identify paths that could expose sensitive information. The goal is to validate that security controls continue to enforce business boundaries correctly and prevent unauthorized access, cross-tenant data leaks, and privilege escalation as your application, team, and customer base grow.
Deliverables
1. Tenant Isolation Assessment
Review:
Row Level Security (RLS) Policies
Review:
​Organization Ownership Model
Review:
Storage Policies
Review:
Service-Role Execution Paths
Review:
RPCs & Privileged Database Functions
Validate:
Cross-Tenant Attack Scenarios
Validate:
Privilege Escalation Attempts
Validate:
Authorization Bypass Testing
Deliver:
Cross-Tenant Isolation Verdict
Deliver:
Tenant Access Flow Analysis
Deliver:
Technical Findings Report
Deliver:
Prioritized Remediation Roadmap
Tenant isolation is one of the most critical security controls in any multi-tenant SaaS platform. A single weakness in authorization logic, Row Level Security (RLS), service-role usage, or database permissions can allow users to access another customer's data, resulting in data breaches, compliance violations, and loss of customer trust. This assessment provides an independent review of the controls responsible for enforcing tenant boundaries throughout your application.
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During the Review phase, we analyze the implementation of Row Level Security (RLS) policies, organization ownership models, storage permissions, service-role execution paths, and privileged database objects such as RPCs, views, and SECURITY DEFINER functions. The objective is to verify that authorization rules are consistently implemented and that every component handling tenant data correctly enforces ownership and access restrictions.
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During the Validation phase, we move beyond documentation and code review by performing practical security testing. We execute targeted cross-tenant attack scenarios, privilege escalation attempts, and authorization bypass tests designed to verify that tenant isolation cannot be circumvented through application logic, APIs, privileged database operations, or misconfigured security controls. This phase validates not only that the implementation appears correct, but that it remains secure under realistic attack conditions.
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The engagement concludes with a comprehensive set of deliverables, including a Cross-Tenant Isolation Verdict, Tenant Access Flow Analysis, and a detailed Technical Findings Report. Every finding includes supporting evidence, business impact, technical explanation, and prioritized remediation guidance, providing engineering teams with a clear and actionable roadmap for strengthening tenant isolation before vulnerabilities reach production.
2. Security Architecture Assessment
The Security Architecture Assessment evaluates whether the platform's security model is implemented consistently across all architectural layers. The review covers authentication, authorization, session management, API security, privileged services, database access, storage controls, and external integrations to identify architectural decisions that could weaken the platform's security posture or introduce systemic risk.
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The assessment validates authentication and authorization flows, privileged execution paths, and the consistency of security controls across application components. Deliverables include a Security Architecture Assessment, Architecture Findings Report, and Security Risk Summary, documenting architectural risks, supporting evidence, and recommendations for improving the security model.
3. Application Security Validation
Application Security Validation verifies that implemented security controls remain effective under realistic attack scenarios. The assessment combines source code review, dependency analysis, API validation, and business logic assessment with practical security testing to identify vulnerabilities affecting confidentiality, integrity, or authorization.
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Validation activities include authorization testing, privilege escalation scenarios, injection testing, session management validation, and verification against applicable OWASP Top 10 categories. The assessment produces a Vulnerability Findings Report, Attack Scenario Evidence, and Security Validation Summary, including reproducible findings, technical impact, and remediation guidance for engineering teams.
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The Recommendations phase consolidates findings from the assessment into a prioritized remediation plan based on risk, business impact, and implementation effort. Each recommendation includes technical guidance and expected risk reduction, enabling engineering teams to address critical issues efficiently while strengthening the platform's overall security posture. Deliverables include a Prioritized Remediation Roadmap, Implementation Recommendations, and an Executive Summary.