Github
CVE-2026-21516
HIGH
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper neutralization of special elements used in a command ('command injection') in Github Copilot allows an unauthorized attacker to execute code over a network.
AnalysisAI
GitHub Copilot is vulnerable to command injection attacks that enable remote code execution without requiring authentication or user interaction beyond a click. An attacker can exploit this network-accessible vulnerability to execute arbitrary commands on affected systems. No patch is currently available for this high-severity vulnerability.
Technical ContextAI
Classified as CWE-77 (Command Injection). Affects Github Copilot. Improper neutralization of special elements used in a command ('command injection') in Github Copilot allows an unauthorized attacker to execute code over a network.
RemediationAI
Monitor vendor advisories for a patch. Restrict network access to the affected service where possible.
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Same weakness CWE-77 – Command Injection
View allSame technique Command Injection
View allShare
External POC / Exploit Code
Leaving vuln.today