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TI-2026-17377 Aliases CVE-2026-21523

GitHub Copilot and Visual Studio Code Remote Code Execution Vulnerability

Priority LOW 38CWE-367Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from Microsoft.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00764 55th percentileScored 2026-11-07
Fix Fixed Microsoft Visual Studio Code CoPilot Chat Extension (Microsoft): 0.37.1Visual Studio Code (Microsoft): 1.110.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftMicrosoft Visual Studio Code CoPilot Chat Extension0.27.0 to before 0.37.10.37.1Patch availableCNA
MicrosoftVisual Studio Code1.0.0 to before 1.110.11.110.1Patch availableCNA
  • Microsoft Visual Studio Code CoPilot Chat Extension VendorMicrosoft Affected 0.27.0 to before 0.37.1 Fixed in 0.37.1 Patch available CNA
  • Visual Studio Code VendorMicrosoft Affected 1.0.0 to before 1.110.1 Fixed in 1.110.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:-:*:*before 1.109.2VulnerableMicrosoft
  • cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:-:*:* Versions before 1.109.2 Vulnerable ·Microsoft

Remediation

  • Fix · CNA Microsoft Visual Studio Code CoPilot Chat Extension (Microsoft) Fixed in 0.37.1
  • Fix · CNA Visual Studio Code (Microsoft) Fixed in 1.110.1

Vendor assessments

Microsoft

Microsoft's page for this CVE →

Impact
Remote Code Execution
Exploited
No
Publicly disclosed
No
Exploitability
Exploitation Less Likely
ProductStatusPlan or fix
Microsoft Visual Studio Code CoPilot Chat ExtensionFixed 0.37.1 · Security Update
Visual Studio CodeFixed 1.110.1 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21523

References

Patch 1

  • TI-2022-19575 Visual Studio Code Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2022-12402 Visual Studio Code Remote Code Execution Vulnerability CVSS 3.1HIGH 8.8
  • TI-2023-13732 Visual Studio Code Spoofing Vulnerability CVSS 3.1MEDIUM 6.6
  • TI-2019-00505 A remote code execution vulnerability exists in Visual Studio Code when it process… CVSS 3.0HIGH 7.8
  • TI-2021-19679 Visual Studio Code Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8
  • TI-2022-06348 Visual Studio Code Remote Development Extension Remote Code Execution Vulnerability CVSS 3.1HIGH 8.1
See all 88 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences