Server-Side Request Forgery Vulnerability in Flowise by Flowise AI
CVE-2026-67620

6.3MEDIUM

Key Information:

Vendor

Flowiseai

Status
Flowise
Vendor
CVE Published:
8 August 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-67620?

The Flowise application version 3.1.4 is susceptible to a server-side request forgery (SSRF) vulnerability due to an inadequate deny-list configuration in its SSRF guard found in httpSecurity.ts. Specifically, the default configuration omits critical endpoints associated with Oracle Cloud Infrastructure and Alibaba Cloud, enabling authenticated attackers to manipulate the server into issuing arbitrary GET requests to cloud instance metadata services. This flaw allows potential exposure of sensitive instance identity data and role credentials, particularly in environments where URL-fetching nodes are publicly accessible, posing significant security risks to affected deployments.

Affected Version(s)

Flowise 0 <= 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-2026-67620-poc
Created by abdugafforov-bobur

References

https://github.com/abdugafforov-bobur/CVE-2026-67620-poc
technical-descriptionexploit
https://flowiseai.com/sunset
vendor-advisory
https://www.vulncheck.com/advisories/flowise-ssrf-via-fet...
third-party-advisory

CVSS V4

Score:
6.3
Severity:
MEDIUM
Confidentiality:
None
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

Bobur Abdugafforov (Mahadsec)
.