Description
Dify before version 1.14.2 contains an authorization bypass vulnerability in the file preview endpoint that allows any authenticated user to read up to 3,000 characters of any uploaded document across all tenants and workspaces using only the file's UUID. Attackers can access the /console/api/files/{file_id}/preview endpoint with an intercepted file UUID to extract sensitive content from documents without ownership or workspace permission verification. NOTE: Dify Cloud allows unauthenticated free self-registration, making account creation trivially accessible to any attacker.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| langgenius | dify | < 1.14.2 | 1.14.2 |
References
- https://www.zafran.io/resources/difytap-zafran-discovers-how-attackers-can-silently-wiretap-ai-data-across-tenants-on-a-platform-powering-1m-apps technical-description exploit
- https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682 technical-description exploit
- dify 1.14.2 Release Notes release-notes
- https://github.com/langgenius/dify/pull/35797 issue-tracking patch
- https://github.com/langgenius/dify/commit/432a6412a3fdb30ce48003d699b90cc7d890df20 patch
- https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-preview-endpoint third-party-advisory