OS Command Injection in idachev MCP-Javadc HTTP Interface
CVE-2026-5802

6.9MEDIUM

Key Information:

Vendor

Idachev

Status
Mcp-javadc
Vendor
CVE Published:
8 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5802?

A vulnerability has been identified in idachev MCP-Javadc, specifically in the HTTP Interface component. An exploitable function allows manipulation of the 'jarFilePath' argument, enabling attackers to perform OS command injection. This flaw could be exploited remotely, raising significant security concerns. Despite receiving prior notification of the issue through an official report, idachev has not yet addressed the vulnerability, and public exploits are already available, heightening the urgency for users to secure their installations.

Affected Version(s)

mcp-javadc 1.2.0

mcp-javadc 1.2.1

mcp-javadc 1.2.2

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-2026-5802 - Proof of Concept

References

https://vuldb.com/vuln/356241
vdb-entrytechnical-description
https://vuldb.com/vuln/356241/cti
signaturepermissions-required
https://vuldb.com/submit/786974
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)
VulDB CNA Team
.