Published Nov 10, 2026Sources checked Nov 10, 2026
5.5MEDIUMCVSS out of 10
What this means
Review the available evidence
CVE-2026-83953 and is rated Medium severity with a CVSS score of 5.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.
What to do next
Remediation and response
Microsoft Security Response Center guidance
Vendor revision: Nov 10, 2026
Install KB1163583.
Vendor-listed releases
1.17.0-251
CISA KEVNot listedBased on the latest collected catalog
EPSSUnavailableNo current score collected
Ransomware useNot markedCISA KEV ransomware field
Threat actors0Source-linked actor relationships
Overview
What is 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.