Disable MCP stdio transport by default#238
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RhysSullivan merged 1 commit intomainfrom Apr 14, 2026
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Stdio MCP sources spawn a subprocess that inherits the parent
`process.env` and accept attacker-controlled `command`/`args`/`cwd`,
which is equivalent to arbitrary code execution and secret
exfiltration on any server-side deployment.
- Add `dangerouslyAllowStdioMCP` option to `mcpPlugin()` (default
false), gated at `resolveConnectorInput` so add/refresh/source-manager
paths are all covered by one check.
- Add `createMcpSourcePlugin({ allowStdio })` React factory that hides
the Remote/Stdio tab and filters stdio presets when disabled.
- Local app opts in on both the server and UI. Cloud keeps the default
(disabled) on both sides.
Deploying with
|
| Status | Name | Latest Commit | Updated (UTC) |
|---|---|---|---|
| ❌ Deployment failed View logs |
executor-cloud | 245cbf8 | Apr 14 2026, 05:36 PM |
@executor/sdk
@executor/plugin-file-secrets
@executor/plugin-google-discovery
@executor/plugin-graphql
@executor/plugin-keychain
@executor/plugin-mcp
@executor/plugin-onepassword
@executor/plugin-openapi
@executor/plugin-workos-vault
commit: |
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Summary
Stdio MCP sources spawn a subprocess that inherits the parent
process.env, is fine for local dev - doesn't impact cloud since we're on workers but worth disabling