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CVE-2026-21523highCWE-367

GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8epss 0.8%
exploitation probability
0.8%top 45% of all CVEs
observed exploitation
nono source reports it
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.
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