Security November 2026 CVE-2026-83953
Improper neutralization of special elements used in a command ('command injection') in Github Copilot allows an authorized attacker to disclose information locally.
Severity Important
CVSS base score 5.5
Impact Information Disclosure
Exploitation detected No known exploitation (MSRC assessment)
Exploitability Not assessed
Publicly disclosed No (MSRC assessment)
EPSS · 30-day forecast No EPSS score collected
Customer action Required: follow the MSRC remediation guidance More details
CVSS vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C
Public detection template No Nuclei template is listed in the current collected catalog
Component Github Copilot
Weakness CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Issued by Microsoft
Last revised 10 Nov 2026 CVSS 3.1 base metrics Red raises the risk · green lowers it
Attack vector LocalAV:L
Attack complexity LowAC:L
Privileges required LowPR:L
User interaction NoneUI:N
Scope UnchangedS:U
Confidentiality HighC:H
Integrity NoneI:N
Availability NoneA:N Source. This summary comes from MSRC's public CVRF document for November 2026. If the MSRC page is blocked in your browser, the NVD and CVE.org records carry the same identifier. None of this says whether your devices are affected.
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