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fkie_cve-2026-55071

2026-09-28T12:34:44.622846+00:00

MCP-for-Stata is a MCP server for integrating Stata into agent loops with a safety-first design. Prior to version 1.19.0, the ado_package_install MCP tool in stata-mcp concatenates user-controlled input directly into a Stata command string without any validation or sanitization. An attacker who can invoke the MCP tool or the equivalent Python API can embed newline characters in the package argument to inject arbitrary Stata commands. Because Stata supports a shell escape command, this leads to full OS-level arbitrary command execution (RCE) under the account running the Stata-MCP server. The tool is registered in the default all profile, so no non-default configuration is required. This issue has been patched in version 1.19.0.

GHSA-49m4-vp58-wgc9 — MCP-for-Stata: Stata Command Injection via Unsanitized `package` in `ado_package_install`

2026-09-28T12:34:44.622924+00:00

Affected: PyPI: stata-mcp

## Stata Command Injection via Unsanitized `package` in `ado_package_install`

### Summary

The `ado_package_install` MCP tool in `stata-mcp` concatenates user-controlled input directly into a Stata command string without any validation or sanitization. An attacker who can invoke the MCP tool or the equivalent Python API can embed newline characters in the `package` argument to inject arbitrary Stata commands. Because Stata supports a `shell` escape command, this leads to full OS-level arbitrary command execution (RCE) under the account running the Stata-MCP server. The tool is registered in the default `all` profile, so no non-default configuration is required. Base CVSS score is **8.4 (High)**.

### Details

The vulnerability originates in `SSC_Install.install()`:

```python # src/stata_mcp/stata/builtin_tools/ado_install/ssc_install.py:14-16 def install(self, package: str) -> str: install_command = f"ssc install {package}{self.REPLACE_MESSAGE}" runner_result = self.controller.run(install_command) ```

The `package` parameter is interpolated into an f-string with no allowlist check, newline rejection, or quoting. The resulting command string is forwarded to the Stata interpreter verbatim:

```python # src/stata_mcp/stata/stata_controller/controller.py:98-99 # Send the command self.child.sendline(command) ```

`pexpect.sendline()` writes the full multi-line string to the Stata REPL, which executes each line as a separate Stata command. Because Stata's `shell` (and `…

PYSEC-2026-3700 — MCP-for-Stata: Stata Command Injection via Unsanitized `package` in `ado_package_install`

2026-09-28T12:34:44.623041+00:00