CVE-2026-21516 is a command injection vulnerability affecting Microsoft GitHub Copilot, allowing an unauthorized attacker to execute arbitrary code over a network. This high-severity flaw (CVSS 7.8) requires user interaction and could lead to significant compromise of confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered considerable community discussion and media coverage, indicating awareness and potential for future exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.5.63-243CPE matchmatch criteria | cpe:2.3:a:microsoft:github_copilot:*:*:*:*:*:jetbrains:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.