CVE-2026-55580High▾ Twilightmcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, config.go initializes Security.Enabled to false, and when MCP_SHELL_SEC_CONFIG_FILE is unset, main.go starts the documented bare-bi…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Exploit-prediction probability, daily snapshots since Aug 26.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
Last analysed / modified upstream
0.2% → 0.2%
mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, config.go initializes Security.Enabled to false, and when MCP_SHELL_SEC_CONFIG_FILE is unset, main.go starts the documented bare-binary deployment without a security policy. SecurityValidator.validateCommand in security.go then short-circuits and allows every command supplied to the shell_exec MCP tool, so an LLM connected over stdio can execute unrestricted OS commands as the mcp-shell process user. The README from-source installation and MCP client configuration omit MCP_SHELL_SEC_CONFIG_FILE, making the insecure state the documented default. This issue is fixed in version 0.6.0.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/sonirico/mcp-shell < 0.6.0Patched in:
github.com/sonirico/mcp-shell 0.6.0Connected by shared product, vendor, weakness, or advisory.
CVE-2026-55582High· 8.4mcp-shell is an MCP server for running shell commands securely, auditably, and on demand
CVE-2026-55581High· 8.4mcp-shell is an MCP server for running shell commands securely, auditably, and on demand
CVE-2022-33186Critical· 9.8A vulnerability in Brocade Fabric OS software v9.1.1, v9.0.1e, v8.2.3c, v7.4.2j, and earlier versions could allow a remote unauthenticated attacker to execute on a Brocade Fabric OS switch commands capable of modifying zoning, disabling …
CVE-2022-37902High· 7.2Authenticated command injection vulnerabilities exist in the ArubaOS command line interface
CVE-2022-37899High· 7.2Authenticated command injection vulnerabilities exist in the ArubaOS command line interface
CVE-2022-37900High· 7.2Authenticated command injection vulnerabilities exist in the ArubaOS command line interface