CVE-2026-21523

Microsoft · Published February 10, 2026

8.0

CVSS v3.1

HIGH

Patch availableGet patch

Description

GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability. Time-of-check time-of-use (toctou) race condition in GitHub Copilot and Visual Studio allows an authorized attacker to execute code over a network.

Affected Products

Microsoft Visual Studio Code CoPilot Chat Extension
Visual Studio Code

CVSS Vector

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