High severity8.1NVD Advisory· Published Sep 4, 2026

CVE-2026-85660

Description

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

MladenSU/cli-mcp-serverllm-create
Range: <0.2.5

Patches

Vulnerability mechanics

References

github.com/MladenSU/cli-mcp-server/blob/main/src/cli_mcp_server/server.pynvd
github.com/MladenSU/cli-mcp-server/issues/17nvd
www.vulncheck.com/advisories/cli-mcp-server-0.2.5-command-allowlist-bypass-via-shell-substitutionnvd

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