CVE-2026-21523: Microsoft Visual Studio Code

High severity, CVSS 8.0. EPSS: 0.8% chance of exploitation in the next 30 days.

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: before 1.109.2 (fixed in 1.109.2)

Published 2026-02-10. Last modified 2026-06-17.