Windows: node_repl MCP fails with “Access is denied” when launched by Codex Desktop
What version of the Codex App are you using (From “About Codex” dialog)?
26.429.3425.0, CLI 0.128.0-alpha.1.
What subscription do you have?
Plus
What platform is your computer?
Win 11 25H2, build 26200.8246
What issue are you seeing?
Codex Desktop on Windows, app version OpenAI.Codex_26.429.3425.0, CLI 0.128.0-alpha.1.
Browser Use fails before opening a tab because node_repl cannot start Node:
failed to execute Node: Přístup byl odepřen. (os error 5)
Manual checks:
- node.exe runs from PowerShell.
- node_repl.exe --disable-sandbox starts manually.
- A wrapper CMD calling node_repl.exe --disable-sandbox works manually over MCP stdio and returns JS result 1+1 = 2.
- The same wrapper configured as [mcp_servers.node_repl_direct] in config.toml loads in Codex, but tool call still fails with os error 5.
This suggests the failure is specific to MCP server / Node kernel launch context inside Codex Desktop.
Additional UI issue:
The Artifacts / Sources popover opens on the right side and overlaps the vertical scrollbar. It prevents grabbing the scrollbar with the mouse. Esc, clicking outside, and the top-right panel button do not dismiss it reliably. This happens in Codex Desktop on Windows.
What steps can reproduce the bug?
Starting Browser Use
What is the expected behavior?
_No response_
Additional information
_No response_
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