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TI-2026-17370 Aliases CVE-2026-21516GHSA-mjvv-wfm9-3vm3

GitHub Copilot for Jetbrains Remote Code Execution Vulnerability

Priority MEDIUM 42CWE-77Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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

Improper neutralization of special elements used in a command ('command injection') in Github Copilot allows an unauthorized attacker to execute code over a network.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00903 59th percentileScored 2026-11-07
Fix Fixed GitHub Copilot Plugin for JetBrains IDEs (Microsoft): 1.5.63

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
MicrosoftGitHub Copilot Plugin for JetBrains IDEs1.0.0 to before 1.5.631.5.63Patch availableCNA
  • GitHub Copilot Plugin for JetBrains IDEs VendorMicrosoft Affected 1.0.0 to before 1.5.63 Fixed in 1.5.63 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:github_copilot:*:*:*:*:*:jetbrains:*:*before 1.5.63-243VulnerableMicrosoft
  • cpe:2.3:a:microsoft:github_copilot:*:*:*:*:*:jetbrains:*:* Versions before 1.5.63-243 Vulnerable ·Microsoft

Remediation

  • Fix · CNA GitHub Copilot Plugin for JetBrains IDEs (Microsoft) Fixed in 1.5.63

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
GitHub Copilot Plugin for JetBrains IDEsFixed 1.5.63 · Security Update

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-21516
  2. 2026-10-03 Alias added: GHSA-mjvv-wfm9-3vm3

References

Patch 1

  • TI-2025-40829 GitHub Copilot 1.372.0 allows filesystem access outside of a workspace folder (without… CVSS 3.1HIGH 7.5
  • TI-2025-40027 GitHub Copilot for Jetbrains Remote Code Execution Vulnerability CVSS 3.1HIGH 8.4
  • TI-2026-37246 GitHub Copilot Remote Code Execution Vulnerability CVSS 3.1HIGH 7.8

Sources

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