Improper neutralization of special elements used in a command leads to a command injection issue in GitHub Copilot and Visual Studio, allowing an unauthorized attacker to execute code locally. This can be achieved through prompt injection, where an attacker hides malicious instructions within a repository comment, README, or PR description. The AI assistant may be tricked into modifying the `.vscode/settings.json` file to enable an auto-approve mode, which allows the agent to execute arbitrary bash commands in the terminal without human confirmation.