Command Injection in Visual Studio Code - CVE-2026-21518

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Main Vulnerability Database Vulnerabilities #VU122622

Command Injection in Visual Studio Code - CVE-2026-21518

Published: February 10, 2026 / Updated: February 19, 2026


Vulnerability identifier: #VU122622
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-21518
CWE-ID: CWE-77
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Microsoft
Affected software:
Visual Studio Code

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary commands on the system.

The vulnerability exists due to insufficient input validation in GitHub Copilot and Visual Studio Code where workspace trust was not always demanded to start MCP servers. A remote attacker can pass specially crafted data to the application and execute arbitrary commands.


How to mitigate CVE-2026-21518

Install updates from vendor's website.

Sources