Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What security feature could be bypassed by successfully exploiting this vulnerability?
Successful exploitation could allow an extension to be installed and run despite an administrator's extension allowlist policy. The user must be convinced to install the extension.
Why is the attack complexity rated High?
Successful exploitation through the extension marketplace requires the attacker to control a publishing identity that meets specific conditions. Obtaining that identity is a prerequisite beyond simply creating a malicious extension.
Security updates
1.145.3 — https://code.visualstudio.com/updates/v1_145
Vulnerabilities 1
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High 7.5
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.
Revision history
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#1
Information published.
References
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CVE-2026-121660 Visual Studio Code Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-121660
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss