Server-Side Request Forgery in TencentCloudBase CloudBase-MCP
CVE-2026-7221

6.9MEDIUM

Key Information:

Vendor

Tencentcloudbase

Status
Cloudbase-mcp
Vendor
CVE Published:
28 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7221?

A vulnerability exists in TencentCloudBase CloudBase-MCP up to version 2.17.0 that exposes the open-url API endpoint to server-side request forgery attacks. This flaw allows remote attackers to manipulate the 'req.body.url' argument in the 'openUrl' function, potentially leading to unauthorized access to internal services. To mitigate this risk, users are advised to upgrade to version 2.17.1, where the vulnerability has been addressed.

Affected Version(s)

CloudBase-MCP 2.0

CloudBase-MCP 2.1

CloudBase-MCP 2.2

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-2026-7221 - Proof of Concept

References

https://vuldb.com/vuln/359821
vdb-entrytechnical-description
https://vuldb.com/vuln/359821/cti
signaturepermissions-required
https://vuldb.com/submit/802230
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

BruceJin (VulDB User)
.