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.
History

Fri, 27 Feb 2026 21:15:00 +0000

Type Values Removed Values Added
First Time appeared Microsoft visual Studio Code Copilot Chat Extension
CPEs cpe:2.3:a:microsoft:visual_studio_code_copilot_chat_extension:*:*:*:*:*:*:*:*
Vendors & Products Microsoft visual Studio Code Copilot Chat Extension

Thu, 26 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 11 Feb 2026 21:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:-:*:*

Tue, 10 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
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.
Title GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability
First Time appeared Microsoft
Microsoft visual Studio Code
Weaknesses CWE-367
CPEs cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft visual Studio Code
References
Metrics cvssV3_1

{'score': 8, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-02-10T17:51:25.077Z

Updated: 2026-02-27T20:55:27.536Z

Reserved: 2025-12-30T18:10:54.846Z

Link: CVE-2026-21523

cve-icon Vulnrichment

Updated: 2026-02-25T15:43:21.756Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-10T18:16:34.743

Modified: 2026-02-11T21:41:36.627

Link: CVE-2026-21523

cve-icon Redhat

No data.