CVE-2026-41949
Dify < 1.14.2 Authorization Bypass via File Preview Endpoint
CVSS Score
5.9
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-639 |
| Vendor | langgenius |
| Product | dify |
| Published | May 18, 2026 |
| Last Updated | Jun 22, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
langgenius / dify
0 < 1.14.2
References
zafran.io: https://www.zafran.io/resources/difytap-zafran-discovers-how-attackers-can-silently-wiretap-ai-data-across-tenants-on-a-platform-powering-1m-apps huntr.com: https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682 github.com: https://github.com/langgenius/dify/releases/tag/1.14.2 github.com: https://github.com/langgenius/dify/pull/35797 github.com: https://github.com/langgenius/dify/commit/432a6412a3fdb30ce48003d699b90cc7d890df20 vulncheck.com: https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-preview-endpoint
Credits
Ido Shani and Gal Zaban of Zafran Security