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Vulnerability record · CVE-2026-21516 · published 10 February 2026

CVE-2026-21516: Microsoft github copilot command injection vulnerability

Microsoft · 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.

7.8 CVSS 3.1 High EPSS 0.82% · top 44.3% CWE-77 · Command injection
7.8CVSS 3.1 base score
0.82%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-21516), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.