CVE-2026-85660

cli-mcp-server 0.2.5 contains a command allowlist bypass vulnerability in the _validate_command_with_operators function when ALLOW_SHELL_OPERATORS is enabled. Attackers can use shell command substitution syntax like $(...) or backticks to execute non-allowlisted commands that bypass the ALLOWED_COMMANDS validation check.

  • Published Sep 4, 2026
  • CVSS 9.2 critical
  • 0.6% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-85660 at the National Vulnerability Database