OS Command Injection Vulnerability in privsim mcp-test-runner Product
CVE-2026-7730

5.3MEDIUM

Key Information:

Vendor

Privsim

Status
Mcp-test-runner
Vendor
CVE Published:
4 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7730?

A vulnerability has been detected in the privsim mcp-test-runner version 0.2.0 affecting the child_process.spawn function located in src/index.ts. By manipulating the command argument, an attacker could execute arbitrary OS commands, potentially leading to severe security breaches. This vulnerability is exploitable remotely, and public exploits are available, which raises significant concerns about its potential misuse. Despite notification to the project maintainers, a resolution has not been provided.

Affected Version(s)

mcp-test-runner 0.2.0

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-2026-7730 - Proof of Concept

References

https://vuldb.com/vuln/360905
vdb-entrytechnical-description
https://vuldb.com/vuln/360905/cti
signaturepermissions-required
https://vuldb.com/submit/807541
third-party-advisory

CVSS V4

Score:
5.3
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

BruceJqs (VulDB User)
VulDB CNA Team
.