This server has been archived and is no longer actively maintained.
MCP Run Python is an MCP server that MCP server to run Python code in a sandbox. Its tool list has not been published yet over stdio, sse and http, requires no API key, and scores 62/100 on MCPpedia's security, maintenance and efficiency rubric.
Step 1
Install in your client
Config is the same across clients — only the file and path differ.
CD
Supported in Claude Desktopstdio, sse, http · Node 18+
Paste into ~/Library/Application Support/Claude/claude_desktop_config.json
{
"mcpServers": {
"mcp-run-python": {
"args": [
"mcp-run-python"
],
"command": "uvx"
}
}
}Are you the author?
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[](https://mcppedia.org/s/mcp-run-python)
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What Mcp Run Python does
MCP server to run Python code in a sandbox.
Test This Server
Run this in your terminal to verify the server starts. Then let us know if it worked — your result helps other developers.
uvx 'mcp-run-python' 2>&1 | head -1 && echo "✓ Server started successfully"
After testing, let us know if it worked:
Scored, not listed
Why this score
Five weighted categories — click any category to see the underlying evidence.
Score breakdown
62/100across 5 weighted dimensions
0255075100
17
20
15
10
−38
Security
Maintenance
Efficiency
Documentation
Compatibility
Categoriesclick a row to see evidence
Security
OSV.dev2 open
CVE-2026-25905mediumCVSS 5.8
MCP Run Python has a Sandbox Escape & Server Takeover Vulnerability
### Impact **Critical Sandbox Escape & Server Takeover:** A critical security vulnerability exists in `mcp-run-python` due to a lack of isolation between the Python runtime (Pyodide) and the host JavaScript environment. The `runPython` and `runPythonAsync` functions execute Python code using Pyodide without restricting access to the JavaScript bridge. This allows any executed Python code—whether from a user or an AI model—to access the `js` module in Pyodide. Through this bridge, the Python cod
Affected:
>= 0source →CVE-2026-25904mediumCVSS 5.8
MCP Run Python Deno Sandbox Misconfiguration Allows SSRF Attacks via Localhost Access
### Impact **Server-Side Request Forgery (SSRF):** A security vulnerability exists in the `mcp-run-python` tool (specifically within the Pydantic-AI integration) due to an overly permissive Deno sandbox configuration. The tool configures the Deno runtime—which is intended to isolate the execution of untrusted Python code—with network permissions that include access to the host's loopback interface (`localhost`). Consequently, malicious Python code executed through the tool can bypass network is
Affected:
>= 0source →Inventory
Tools (1)
Click any tool to inspect its schema.
~68 tokens total
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Frequently Asked Questions
- Is Mcp Run Python safe to use?
- Mcp Run Python has 4 known CVEs tracked by MCPpedia. You can verify these on OSV.dev by searching for "mcp-run-python". Review the Security section above for details before installing.
- How do I install Mcp Run Python?
- Mcp Run Python supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
- What can Mcp Run Python do?
- Mcp Run Python provides 1 tool: run_python. See the full tools list on the server page for descriptions and parameters.
- What AI clients work with Mcp Run Python?
- Mcp Run Python is compatible with claude-desktop, cursor, claude-code. It uses stdio and sse and http transport.
- Is Mcp Run Python actively maintained?
- Mcp Run Python is less actively maintained — last commit was 208 days ago. It has 194 GitHub stars.
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