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Claude Code v1.0.125

Localhost Binding Control

What: New sandbox configuration option to allow processes to bind to localhost network addresses.

How to use:

{
  "sandbox": {
    "network": {
      "allowLocalBinding": true
    }
  }
}

Details:

  • Defaults to false for security
  • When enabled, allows sandboxed processes to:
  • Bind to localhost ports
  • Accept inbound connections on localhost
  • Make outbound connections to localhost
  • Useful for development servers, local APIs, and inter-process communication
  • Only affects localhost (127.0.0.1), not external network access
  • Evidence: Schema at line 363371, getAllowLocalBinding() export at line 364464, sandbox profile generation at line 363908

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v1.0.125 →