JustAppSec
HIGH SeverityCVSS 3.18.0CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CVE-2026-21523

Last updated Feb 27, 2026 · Published Feb 10, 2026

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Description

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

1 listed
  • Microsoft:Microsoft Visual Studio Code CoPilot Chat Extension; Microsoft:Visual Studio Code

Mappings

CWE

CWE-367

CAPEC

None listed.

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