Authorization Bypass in Dify File Preview Endpoint
CVE-2026-41949

8.2HIGH

Key Information:

Vendor

Langgenius

Status
Dify
Vendor
CVE Published:
18 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-41949?

The Dify platform, specifically versions up to 1.14.1, is susceptible to an authorization bypass vulnerability within its file preview endpoint. This flaw allows any authenticated user to access sensitive information by exploiting the file's UUID. Attackers can utilize the /console/api/files/{file_id}/preview endpoint to retrieve up to 3,000 characters of any uploaded document across multiple workspaces and tenants without the requisite permissions. The situation is exacerbated by Dify Cloud's feature that permits unauthenticated users to create accounts easily, enabling attackers to bypass security measures with minimal effort.

Affected Version(s)

dify 0 <= 1.14.1

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-41949 - Proof of Concept

References

https://huntr.com/bounties/d50a0240-7951-4939-b989-9bded6...
technical-descriptionexploit
https://github.com/langgenius/dify/pull/35797
issue-trackingpatch
https://www.vulncheck.com/advisories/dify-authorization-b...
third-party-advisory

CVSS V4

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ido Shani and Gal Zaban of Zafran Security
.