Copilot News 09/23/2026 AI Rating: Medium

GitHub Copilot App Adds Local Sandboxing to Limit Unintended Command Impact

#GitHubCopilot#GitHub#Sandboxing#Security#DeveloperTools

GitHub added local sandboxing to the Copilot app, limiting what an agent session can touch on a developer’s machine to reduce the impact of unintended commands.

Details

  • What it restricts: filesystem access (read/write, read-only, or blocked folders), network connectivity (outbound internet and local network), and credentials (Git and GitHub CLI authentication)
  • How to enable it: toggle “Sandbox new sessions” under the app’s Sandbox settings to apply per project, or run /sandbox on for an active session; changes take effect on new sessions or after a restart
  • Availability: public preview, disabled by default, and limited to local repository and working-tree sessions — it doesn’t apply to cloud or remote sessions; enterprise-managed policies can layer additional restrictions on top of project settings

What happened next

Local sandboxing extends the same kind of containment GitHub has been building into its cloud and remote agent sessions down to local, on-machine sessions, giving developers a way to limit an agent’s reach on their own computer rather than only in hosted environments.

Source https://github.blog/changelog/2026-09-23-local-sandboxing-in-the-github-copilot-app

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