Microsoft GitHub Copilot Chat vulnerabilities

5 CVEs affecting Microsoft GitHub Copilot Chat, 0 known to be exploited (CISA KEV), with EPSS scores. Latest: CVE-2026-65675, published 2026-08-11.

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Known exploited (CISA KEV) first, then by EPSS exploit probability.

• CVE-2026-50519, published 2026-06-19. High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days. Initialization of a resource with an insecure default in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to disclose information over a network.
• CVE-2025-62222, published 2025-11-11. High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days. Improper neutralization of special elements used in a command ('command injection') in Visual Studio Code CoPilot Chat Extension allows an unauthorized attacker to execute code over a network.
• CVE-2026-23653, published 2026-04-14. Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days. Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an authorized attacker to disclose information over a network.
• CVE-2026-65675, published 2026-08-11. Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days. No cwe for this issue in Visual Studio Code CoPilot Chat Extension allows an unauthorized attacker to bypass a security feature over a network.
• CVE-2025-62449, published 2025-11-11. Medium severity, CVSS 6.8. EPSS: 0.5% chance of exploitation in the next 30 days. Improper limitation of a pathname to a restricted directory ('path traversal') in Visual Studio Code CoPilot Chat Extension allows an authorized attacker to bypass a security feature locally.