CVE-2026-21518

Published: Feb 10, 2026Modified: Jun 17, 2026

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

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 (1)

Products: Microsoft: Visual Studio Code

Microsoft

1 product

Visual Studio Code

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Microsoft Visual Studio Code	Before 1.109.2

Related CWEs

CWE-77

Improper Neutralization of Special Elements used in a Command ('Command Injection')

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

References (1)

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

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.