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CVE-2026-21516

HighCVSS 7.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	GitHub Copilot Plugin for JetBrains IDEs	>= 1.0.0, < 1.5.63

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21516Vendor Advisory

Timeline

Published: Feb 10, 2026
Last modified: Jun 17, 2026
NVD status: Analyzed

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CVE-2026-21516: High severity, CVSS 7.8 | Vulnix