CVE-2026-21516

HIGH

GitHub Copilot < 1.5.63 - Unauthenticated Remote Code Execution

Title source: llm
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 8.8
EPSS 0.0003
EPSS Percentile 9.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-77
Status published
Products (2)
Microsoft/GitHub Copilot Plugin for JetBrains IDEs 1.0.0 - 1.5.63
microsoft/github_copilot < 1.5.63-243
Published Feb 10, 2026
Tracked Since Feb 18, 2026