CVE-2026-21523

HIGH

Microsoft Visual Studio Code < 1.109.2 - TOCTOU Race Condition

Title source: rule
STIX 2.1

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.

References (1)

Scores

CVSS v3 8.0
EPSS 0.0003
EPSS Percentile 10.2%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-367
Status published
Products (3)
Microsoft/Microsoft Visual Studio Code CoPilot Chat Extension 0.27.0 - 0.37.1
Microsoft/Visual Studio Code 1.0.0 - 1.109.2
microsoft/visual_studio_code < 1.109.2
Published Feb 10, 2026
Tracked Since Feb 18, 2026