Command Injection Vulnerability in GitHub Copilot and Visual Studio
CVE-2026-21256

8.8HIGH

Key Information:

Vendor

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

What is CVE-2026-21256?

A command injection vulnerability exists in GitHub Copilot and Visual Studio due to improper neutralization of special elements used in commands. This flaw allows unauthorized attackers to execute arbitrary code over a network, potentially compromising the integrity and security of affected systems. It is crucial to apply patches and mitigate risks associated with this issue to safeguard applications and sensitive data from exploitation.

Affected Version(s)

Microsoft Visual Studio 2022 version 17.14 17.14.0 < 17.14.26

Microsoft Visual Studio 2026 version 18.3 18.3.0

References

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

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.