Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker could influence content processed by the Visual Studio Code agent so that it requests a specially crafted URL. Successful exploitation could bypass configured network restrictions and allow access to resources that the policy is intended to block. User interaction is required to run the agent against attacker-controlled content.
What security feature could be bypassed by successfully exploiting this vulnerability?
An attacker who successfully exploited this vulnerability could bypass the network access restrictions enforced for the Visual Studio Code agent, allowing outbound connections to resources that the configured policy is intended to block.
Security updates
1.136.2 — https://code.visualstudio.com/updates/v1_136
Vulnerabilities 1
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High 8.2
Visual Studio Code Security Feature Bypass Vulnerability
Not failing securely ('failing open') in Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.
Revision history
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#2
Updated an acknowledgement. This is an informational change only.
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#1
Information published.
References
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CVE-2026-81379 Visual Studio Code Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-81379
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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