OCTOBER 6, 2026
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Case File

CVE-2026-79538

CRITICAL · CVSS 9.8 EPSS 0.43% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-29 · Last synced 2026-10-06

CyberRota Analysis

AI-Generated

MetaMCP versions up to and including 2.4.22 are susceptible to a critical code execution vulnerability via the internal MCP inspector proxy endpoint, specifically through the GET request to /mcp-proxy/server/stdio. This flaw allows attackers to execute arbitrary code, potentially compromising the integrity and confidentiality of the affected systems. Organizations utilizing MetaMCP should prioritize immediate remediation to mitigate the risk of exploitation.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
code execution
GitHub PoC Links
github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-79538
Severity
CRITICAL
CVSS
9.8
EPSS
0.43%

Original NVD Description

metatool-ai MetaMCP up to and including 2.4.22 is vulnerable to Code Execution in the internal MCP inspector proxy endpoint GET /mcp-proxy/server/stdio (createTransport, STDIO branch, routers/mcp-proxy/server.ts).