# Cross-Tenant Data Leakage in Shared Vector Stores

> Understand how multi-tenant RAG architectures leak data across user boundaries and how to test for metadata isolation failures.

Canonical: https://codelivly.com/rooms/cross-tenant-data-leakage-in-shared-vector-stores
Last updated: 2026-10-13

| | |
|---|---|
| Level | Intermediate |
| Category | Cybersecurity |
| Lessons | 3 |
| Estimated time | 30 min |
| XP | 100 |

This module explores the critical security risks of multi-tenant vector databases. You will learn how cross-tenant data leakage occurs when namespace or metadata isolation fails, allowing users to retrieve sensitive information belonging to other organizations or user groups. We will cover testing methodologies for isolation bypasses and analyze real-world case studies to understand the severe impact of these architectural flaws.

## Lessons

1. What is Cross-Tenant Leakage and Why It Happens (30 min)
2. Testing for Namespace/Metadata Isolation Failures (30 min)
3. Real-World Cross-Tenant RAG Leak Case Studies (30 min)

## Related

- [Learning path: RAG and Vector Database Attacks](https://codelivly.com/learning-paths/rag-and-vector-database-attacks)
- [All rooms](https://codelivly.com/rooms)