Missing Authorization Vulnerability in Flowise by Flowise AI
CVE-2026-71962

8.7HIGH

Key Information:

Vendor

Flowiseai

Status
Flowise
Vendor
CVE Published:
10 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-71962?

Flowise versions 2.2.4 through 3.1.4 are vulnerable to a missing authorization issue in the POST /api/v1/openai-assistants-file/download endpoint. This flaw permits unauthenticated attackers to access private files by taking advantage of the endpoint's improper handling of session and API key verification. As the endpoint is included in the global authentication whitelist, attackers can exploit this to retrieve files from any chatflow by supplying valid identifiers like chatflowId, chatId, and fileName, potentially compromising private chatflows across different organizations or workspaces.

Affected Version(s)

Flowise 2.2.4 <= 3.1.4

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-2026-71962 - Proof of Concept

References

https://gist.github.com/haidang-infosec/402db84bee7aca2f5...
technical-descriptionexploit
https://flowiseai.com/sunset
vendor-advisory
https://www.vulncheck.com/advisories/flowise-missing-auth...
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Mai Hai Dang
.