High severity8.8NVD Advisory· Published Feb 10, 2026· Updated Jun 17, 2026

CVE-2026-21516

Description

Improper neutralization of special elements used in a command ('command injection') in Github Copilot allows an unauthorized attacker to execute code over a network.

Affected products

Microsoft/GitHub Copilot Plugin for JetBrains IDEsv5
Range: 1.0.0
GitHub/Copilotllm-fuzzy
Microsoft/Github Copilotllm-fuzzy2 versions
(expand)+ 1 more
- (no CPE)
- cpe:2.3:a:microsoft:github_copilot:*:*:*:*:*:jetbrains:*:*range: <1.5.63-243

Patches

Vulnerability mechanics

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21516nvdVendor Advisory

News mentions

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epss	0.001
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ransomware	0.000