Breaking Tenant Boundaries, When Path Traversal Isn't About the Filesystem
labs.cognisys.group | blog | #data-exposure | #path-traversal | #saas | #ssrf | #cross-tenant | #multi-tenant
Summary
Multi-tenant SaaS applications are a tricky beast. From the outside, they look like a single product, but underneath the surface, they’re hosting data and configurations for dozens, hundreds, sometimes thousands of separate organisations. Every request that hits the backend has to know which tenant it belongs to and what data it should be allowed to touch. When that boundary is enforced cleanly, the platform works as advertised. When it isn’t, the consequences can be severe. A single authenticated user in one organisation might be able to peek into the files of every other organisation on the platform.
- Published
- Collected
--- id: 7487 title: "Breaking Tenant Boundaries, When Path Traversal Isn't About the Filesystem" source_domain: labs.cognisys.group source_url: "https://labs.cognisys.group/posts/Breaking-Tenant-Boundaries-When-Path-Traversal-Isn't-About-the-Filesystem/" published_at: "2026-05-26T12:45:00Z" tags: ["data-exposure", "path-traversal", "saas", "ssrf", "cross-tenant", "multi-tenant"] phying_url: "https://phying.com/item/7487" lang: en --- # Breaking Tenant Boundaries, When Path Traversal Isn't About the Filesystem ## Summary Multi-tenant SaaS applications are a tricky beast. From the outside, they look like a single product, but underneath the surface, they’re hosting data and configurations for dozens, hundreds, sometimes thousands of separate organisations. Every request that hits the backend has to know which tenant it belongs to and what data it should be allowed to touch. When that boundary is enforced cleanly, the platform works as advertised. When it isn’t, the consequences can be severe. A single authenticated user in one organisation might be able to peek into the files of every other organisation on the platform. ## Intelligence Metadata - **Sources:** labs.cognisys.group - **Published:** 2026-05-26T12:45:00Z - **Original:** https://labs.cognisys.group/posts/Breaking-Tenant-Boundaries-When-Path-Traversal-Isn't-About-the-Filesystem/ - **Phying News:** https://phying.com/item/7487