CVE-2026-21518

HIGH

Visual Studio Code < 1.109.2 and 1.110.1 - Command Injection via GitHub Copilot Chat Extension

Title source: llm

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.

References (1)

Core 1

Core References

Vendor Advisory vendor-advisory patch

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21518

Scores

CVSS v3 8.8

EPSS 0.0007

EPSS Percentile 21.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-77

Status published

Products (4)

Microsoft/Microsoft Visual Studio Code CoPilot Chat Extension 0.27.0 - 0.37.1

Microsoft/Visual Studio Code 1.0.0 - 1.109.2

Microsoft/Visual Studio Code 1.0.0 - 1.110.1

microsoft/visual_studio_code < 1.109.2

Published Feb 10, 2026

Tracked Since Feb 18, 2026