Unrated severityNVD Advisory· Published Feb 10, 2026· Updated Apr 10, 2026

GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability

CVE-2026-21518

Description

Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.

Affected products

Microsoft/Copilotllm-fuzzy
Microsoft/Visual Studiollm-fuzzy
Microsoft/Microsoft Visual Studio Code CoPilot Chat Extensionv5
Range: 0.27.0
Microsoft/Visual Studio Codev5
Range: 1.0.0

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21518mitrevendor-advisorypatch

News mentions

ZDI-26-253: Microsoft Visual Studio Code mcp.json Command Injection Remote Code Execution Vulnerability
Zero Day Initiative · Apr 2, 2026

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