CVE-2026-21523

No fix known EPSS <1%CVSS 8.0

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.

Published 2026-02-10 · CVE record · OSV

Products: Microsoft Visual Studio Code CoPilot Chat Extension, Microsoft Visual Studio Code