MSRC-CVE-2026-121663 — Visual Studio Code Security Feature Bypass Vulnerability

Summary

Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation More Likely. Customer action: Required.

Details

How could an attacker exploit this vulnerability?
An attacker could convince a user to open a specially crafted Visual Studio Code workspace. Successful exploitation could bypass Workspace Trust protections and allow attacker-controlled content to execute code in the context of the user. User interaction is required, but the user does not need to grant trust.

Security updates
1.145.3 — https://code.visualstudio.com/updates/v1_145

Vulnerabilities 1

High 8.8

CVE-2026-121663

Visual Studio Code Security Feature Bypass Vulnerability

Incomplete list of disallowed inputs in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.

Microsoft Visual Studio Code

Nov 10, 2026

Revision history

2026-11-10 #1
Information published.

References

CVE-2026-121663 Visual Studio Code Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-121663
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss