Incomplete List of Disallowed Inputs in Visual Studio Code - CVE-2026-121660
Published: November 11, 2026
Vulnerability identifier: #VU165432
CSH Severity: Medium
CVSS v4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-121660
CWE-ID: CWE-184
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass an administrator's extension allowlist policy and run a disallowed extension in Visual Studio Code.
The vulnerability exists due to an incomplete list of disallowed inputs in Visual Studio Code when evaluating extension installations against an administrator's allowlist policy. A remote attacker can convince a user to install a malicious extension to bypass the policy and execute the extension.
Exploitation through the extension marketplace requires control of a publishing identity that meets specific conditions, beyond simply creating a malicious extension.
Affected software
Visual Studio Code
How to mitigate CVE-2026-121660
Install security update from vendor's website.
Visual Studio Code - update to 1.145.3