Threats Tagged 'cve-2026-55581'
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Threats Tagged 'cve-2026-55581'
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CVE-2026-55581: CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') in sonirico mcp-shellCVE-2026-55581 0 mcp-shell is an MCP server for running shell commands securely, auditably, and on demand. Prior to 0.6.0, the default Docker security.yaml includes /bin/bash in allowed_executables, while security.go validates only the first token and checkBlockedPatternsAndCommands does not reject the shell command-mode flag -c. A caller of the shell_exec MCP tool can provide the command argument `/bin/bash -c <arbitrary-command>`, which passes validation and reaches executor.go, where parseCommand and exec.CommandContext execute the arbitrary command as mcpuser outside the intended allowlist. This issue is fixed in version 0.6.0. Join the discussion | CVE Database V5 | 08/25/2026, 15:40:10 UTC Added: 08/25/2026, 15:52:52 UTC |
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