CVE-2025-62222: GitHub Copilot Chat RCE Vulnerability

CVE-2025-62222 Overview

A command injection vulnerability has been identified in the Visual Studio Code CoPilot Chat Extension that allows an unauthorized attacker to execute arbitrary code over a network. This improper neutralization of special elements used in a command (CWE-77) enables remote code execution when a user interacts with maliciously crafted input through the Copilot Chat interface.

Critical Impact

Unauthorized attackers can achieve remote code execution on affected systems, potentially leading to complete system compromise, data exfiltration, and lateral movement within development environments.

Affected Products

• Microsoft GitHub Copilot Chat for Visual Studio Code (all versions prior to patch)

Discovery Timeline

• 2025-11-11 - CVE-2025-62222 published to NVD
• 2025-11-14 - Last updated in NVD database

Technical Details for CVE-2025-62222

Vulnerability Analysis

This command injection vulnerability (CWE-77) stems from improper input validation (CWE-20) in the Visual Studio Code CoPilot Chat Extension. The extension fails to properly neutralize special elements before using user-supplied input in command construction. When processing chat interactions, the extension does not adequately sanitize input that gets passed to underlying system commands, creating an avenue for attackers to inject arbitrary commands.

The attack requires network access and user interaction, meaning an attacker must craft malicious content that a victim user interacts with through the Copilot Chat extension. Once triggered, the injected commands execute with the privileges of the Visual Studio Code process, which typically has access to the user's development environment, source code repositories, and potentially sensitive credentials stored in configuration files.

Root Cause

The root cause lies in improper input validation and neutralization of special command elements within the Copilot Chat Extension. The extension processes user input without adequate sanitization before incorporating it into command execution contexts. This allows specially crafted input containing command separators, shell metacharacters, or other special elements to break out of the intended command structure and execute arbitrary attacker-controlled commands.

Attack Vector

The attack vector is network-based with user interaction required. An attacker could craft a malicious prompt, file, or repository content that, when processed by the Copilot Chat Extension, triggers command injection. This could be delivered through:

1. Malicious code repositories that the victim opens in VS Code
2. Crafted prompts shared with developers
3. Malicious content injected into legitimate projects through supply chain attacks

When the victim interacts with the malicious content through Copilot Chat, the injected commands execute on the victim's system. The vulnerability mechanism involves insufficient sanitization of input that is eventually passed to command execution functions. For detailed technical information, refer to the Microsoft Security Update CVE-2025-62222.

Detection Methods for CVE-2025-62222

Indicators of Compromise

• Unusual child processes spawned by Visual Studio Code or its extension host processes
• Unexpected network connections originating from VS Code processes
• Suspicious command-line arguments in processes associated with the Copilot Chat extension
• Anomalous file system access patterns during Copilot Chat interactions

Detection Strategies

• Monitor for unusual process creation events where the parent process is Visual Studio Code or related extension host processes
• Implement endpoint detection rules to identify shell command execution patterns originating from VS Code
• Review VS Code extension logs for anomalous activity patterns
• Deploy application allowlisting to detect unexpected binaries executed by development tools

Monitoring Recommendations

• Enable detailed logging for Visual Studio Code and extension activities
• Configure EDR solutions to alert on command injection patterns originating from IDE processes
• Monitor for lateral movement attempts following VS Code process anomalies
• Implement network monitoring for unusual outbound connections from development workstations

How to Mitigate CVE-2025-62222

Immediate Actions Required

• Update the GitHub Copilot Chat extension to the latest patched version immediately
• Review recent Copilot Chat activity for any suspicious interactions
• Temporarily disable the Copilot Chat extension if immediate patching is not possible
• Scan affected development systems for indicators of compromise

Patch Information

Microsoft has released a security update to address this vulnerability. Administrators and users should update the GitHub Copilot Chat extension through the Visual Studio Code Extensions marketplace or via automated extension updates. Refer to the Microsoft Security Update CVE-2025-62222 for official patch information and guidance.

Workarounds

• Disable the GitHub Copilot Chat extension until the patch can be applied
• Restrict network access for development workstations to reduce attack surface
• Avoid opening untrusted repositories or code files while using vulnerable versions
• Implement strict code review processes for external contributions before opening in VS Code

# Disable GitHub Copilot Chat extension via VS Code CLI
code --disable-extension GitHub.copilot-chat

# Verify extension is disabled
code --list-extensions --show-versions | grep -i copilot