Command Injection Vulnerability in GitHub Copilot and Visual Studio
CVE-2026-21257

8HIGH

Key Information:

Vendor

Microsoft
Status
Microsoft Visual Studio 2022 Version 17.14
Microsoft Visual Studio 2022 Version 18.3
Vendor
CVE Published:
10 February 2026

What is CVE-2026-21257?

A command injection vulnerability exists in GitHub Copilot and Visual Studio, allowing authorized attackers to execute commands that may lead to privilege escalation over a network. This flaw arises from improper handling of special elements in commands, potentially enabling malicious users to gain unauthorized access and control within the affected environments.

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Affected Version(s)

Microsoft Visual Studio 2022 version 17.14 17.14.0 < 17.14.26

Microsoft Visual Studio 2022 version 18.3 18.3.0

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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