CVE-2026-21518

GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability

Published Feb 10, 2026 CVSS 3.1 · 8.8 High EPSS 1.4% KEV · Not listed
Description
Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Microsoft visual Studio Code Copilot Chat Extension
CPEs cpe:2.3:a:microsoft:visual_studio_code_copilot_chat_extension:*:*:*:*:*:*:*:*
Vendors & Products Microsoft visual Studio Code Copilot Chat Extension
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C'}

cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'}

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:-:*:*
Type Values Removed Values Added
Description Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to bypass a security feature over a network.
Title GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability
First Time appeared Microsoft
Microsoft visual Studio Code
Weaknesses CWE-77
CPEs cpe:2.3:a:microsoft:visual_studio_code:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft visual Studio Code
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
microsoft
Published
Updated
Aug 19, 2026, 4:26 PM
Reserved
Dec 30, 2025, 6:10 PM
Status
Modified
Published
Feb 10, 2026, 6:16 PM
Modified
Jun 17, 2026, 10:18 AM