# CVE-2026-31040: SepineTam stata-mcp code injection via Stata do-file shell-escape

Source: https://junglewise.ai/threats/cve-2026-31040-sepinetam-stata-mcp-code-injection-via-stata-do-file-shell-escape  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-04-08. Updated: 2026-07-25  
License: CC BY 4.0 with a link back

CVE-2026-31040 · Severity: critical · CVSS 9.8 · Published 2026-04-08

stata-mcp, a tool used to integrate Stata data analysis software with other platforms, contains a security flaw that allows for unauthorized command execution. By providing a specially crafted Stata script (do-file), an attacker can bypass security checks to run arbitrary commands on the underlying operating system. This could lead to a complete system takeover, unauthorized data access, or service disruption.

Technologies: [stata-mcp (PyPI)](https://junglewise.ai/threats/technologies/stata-mcp). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2026-31040 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-31040 being exploited in the wild.

**How severe is CVE-2026-31040?** Critical severity, with a CVSS score of 9.8, published 8 April 2026.

**Which products and versions are affected?** stata-mcp (PyPI) ECOSYSTEM:introduced=0,fixed=1.13.0.

**Is there a fix for CVE-2026-31040?** Yes. stata-mcp (PyPI): upgrade to 1.13.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-31040 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-31040?** Check whether you run stata-mcp (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- stata-mcp (PyPI): upgrade to 1.13.0 or later

  ```sh
  pip install "stata-mcp>=1.13.0"
  ```


## Technical details

A code injection vulnerability (CWE-94) exists in stata-mcp prior to version 1.13.0 due to insufficient validation of user-supplied Stata do-file content. The software failed to block Stata shell-escape directives, such as '!cmd' or 'shell cmd', which allow the Stata interpreter to execute commands directly on the host operating system. An attacker can exploit this by submitting a do-file containing these dangerous tokens, leading to arbitrary command execution with the privileges of the application. The issue was addressed in version 1.13.0 by implementing a validation guard in 'src/stata_mcp/core/stata/stata_do/do.py' that rejects files containing shell-escape sequences.

## Affected products

- SepineTam stata-mcp prior to v1.13.0

## Identifiers

- CVE-2026-31040
- GHSA-jpcj-7wfg-mqxv
- PYSEC-2026-3076

## Timeline

- 2025-11-20: patched: Fix merged and version v1.13.0 released
- 2026-04-08: advisory: CVE-2026-31040 published

## References

- [https://github.com/SepineTam/stata-mcp/commit/52413ce](https://github.com/SepineTam/stata-mcp/commit/52413ce)
- [https://github.com/SepineTam/stata-mcp/issues/20](https://github.com/SepineTam/stata-mcp/issues/20)
- [https://github.com/SepineTam/stata-mcp/pull/21](https://github.com/SepineTam/stata-mcp/pull/21)
- [https://github.com/SepineTam/stata-mcp/releases/tag/v1.13.0](https://github.com/SepineTam/stata-mcp/releases/tag/v1.13.0)

## Related threats

- [stata-mcp Command Injection in ado_package_install](https://junglewise.ai/threats/cve-2026-55071-stata-mcp-command-injection-in-ado-package-install)
- [SepineTam MCP-for-Stata command injection in log_file_name](https://junglewise.ai/threats/cve-2026-47708-sepinetam-mcp-for-stata-command-injection-in-log-file-name)