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
dify: dify
References6
- github.com/langgenius/dify/pull/35797 Issue TrackingMitigationPatch
- huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682 ExploitThird Party Advisory
- github.com/langgenius/dify/commit/432a6412a3fdb30ce48003d699b90…
- github.com/langgenius/dify/releases/tag/1.14.2
- www.vulncheck.com/advisories/dify-authorization-bypass-via-file… Third Party Advisory
- www.zafran.io/resources/difytap-zafran-discovers-how-attackers-…
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 4.0
-
8.2
HIGH
Score source: CNA
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 38 · as of 14 November 2026
- CWE
- CWE-639
Could this be exploited in your environment?
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