Server-Side Request Forgery Vulnerability in JoeCastrom mcp-chat-studio
CVE-2026-7147

6.9MEDIUM

Key Information:

Vendor

Joecastrom

Status
Mcp-chat-studio
Vendor
CVE Published:
27 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7147?

A vulnerability exists in JoeCastrom's mcp-chat-studio product, specifically in the LLM Models API component. The issue stems from improper handling of the req.query.base_url argument in the file server/routes/llm.js. This flaw permits a server-side request forgery, allowing attackers to manipulate requests and potentially exploit this vulnerability remotely. Despite being notified early via an issue report, the development team has not yet addressed the problem, raising concerns over potential exploitation in the wild.

Affected Version(s)

mcp-chat-studio 1.0

mcp-chat-studio 1.1

mcp-chat-studio 1.2

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-2026-7147 - Proof of Concept

References

https://vuldb.com/vuln/359746
vdb-entrytechnical-description
https://vuldb.com/vuln/359746/cti
signaturepermissions-required
https://vuldb.com/submit/801896
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

MidA (VulDB User)
VulDB CNA Team
.