CVE-2026-21523

⚠️ high

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 Score

8.0

High

EPSS Score

0.0

Exploit Probability

Published Date

2026-02-10

First Seen: 2026-02-11

This CVE is High Risk - more severe than 77.6% of all 321,566 vulnerabilities in our database.

#72,014

Top 25% most severe

Severity Percentile

Last Modified 2026-02-11

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

CWE IDs (Weakness Types)

CWE-367

📦 Affected Products 1

Vendor	Product	Status	Affected Versions
microsoft	visual_studio_code	Affected	< 1.109.2

Vendor Advisory

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-41109	⚠️ high	8.8	0.1	Improper neutralization of special elements in output used by a downstream component ('injection') in GitHub Copilot and...	2026-05-12
CVE-2026-41610	🔶 medium	6.3	0.0	Improper neutralization of input during web page generation ('cross-site scripting') in Visual Studio Code allows an una...	2026-05-12
CVE-2026-41611	⚠️ high	7.8	0.0	Improper neutralization of script-related html tags in a web page (basic xss) in Visual Studio Code allows an unauthoriz...	2026-05-12
CVE-2026-41613	⚠️ high	8.8	0.1	Session fixation in Visual Studio Code allows an unauthorized attacker to elevate privileges over a network.	2026-05-12
CVE-2026-21518	⚠️ high	8.8	0.0	Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio ...	2026-02-10
CVE-2025-64660	⚠️ high	8.0	0.1	Improper access control in GitHub Copilot and Visual Studio Code allows an authorized attacker to execute code over a ne...	2025-11-20

These CVEs affect the same products