MSRC-CVE-2026-83953 — GitHub Copilot for Jetbrains Information Disclosure Vulnerability

Summary

Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited. Customer action: Required.

Details

What type of information could be disclosed by this vulnerability?
The type of information that could be disclosed if an attacker successfully exploited this vulnerability is unauthorized file system access - reading from the file system.

Security updates
1.17.0-251 — https://plugins.jetbrains.com/plugin/17718-github-copilot--your-ai-pair-programmer/versions/stable/1163583

Vulnerabilities 1

Medium 5.5

CVE-2026-83953

GitHub Copilot for Jetbrains Information Disclosure Vulnerability

Improper neutralization of special elements used in a command ('command injection') in Github Copilot allows an authorized attacker to disclose information locally.

Microsoft GitHub Copilot Plugin for JetBrains IDEs

Nov 10, 2026

Revision history

2026-11-10 #1
Information published.

References

CVE-2026-83953 GitHub Copilot for Jetbrains Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-83953
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss