CVE-2026-41949

HIGH EPSS 34.8%
Published May 18, 20261mo ago · Modified Jun 22, 20261w ago
8.2 CVSS 4.0
High
Find Similar
Published May 18, 2026 1mo ago
Last Modified Jun 22, 2026 1w ago

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.

CVSS Details

Base Score
8.2
Exploitability
—
Impact
—
Vector string
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
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
34.8% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-639

Affected Products 1

VendorProductVersionRange
difydify* ≤1.14.1

References 6

  • github.com https://github.com/langgenius/dify/commit/432a6412a3fdb30ce48003d699b90cc7d890df20
  • github.com https://github.com/langgenius/dify/pull/35797
    Issue TrackingMitigationPatch
  • github.com https://github.com/langgenius/dify/releases/tag/1.14.2
  • huntr.com https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded66c7682
    ExploitThird Party Advisory
  • vulncheck.com https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-preview-endpoint
    Third Party Advisory
  • 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

Remediation

  • github.com https://github.com/langgenius/dify/pull/35797
    Issue TrackingMitigationPatch