CVE-2026-30618

CRITICAL 9.8

CVSS Score

9.8

EPSS Score

0.6%

EPSS Percentile

45th

xszyou Fay 4.3.1 contains a remote code execution vulnerability in its MCP STDIO server management and command execution handling. A remote attacker can access the publicly exposed MCP management interface and configure an MCP STDIO server with attacker-controlled commands and parameters, resulting in execution of arbitrary commands on the server. Successful exploitation allows arbitrary command execution within the context of the Fay service.

Vendor	n/a
Product	n/a
Published	Jul 15, 2026
Last Updated	Jul 16, 2026

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Affected Versions

n/a / n/a

n/a

References

NVD ↗ CVE.org ↗ EPSS Data ↗

ox.security: https://www.ox.security/blog/mcp-supply-chain-advisory-rce-vulnerabilities-across-the-ai-ecosystem/ github.com: https://github.com/xszyou/Fay