CVE-2026-21518 | BDVDB-2026-314784 Detail

MicrosoftMicrosoft Visual Studio Code CoPilot Chat Extension

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.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

References#

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21518

Exploit#

No public exploit known

History#

Version 12026-02-10Record published in the CVE List.
Version 22026-08-19Most recent update recorded in the CVE List.

Published

Published: 2026-02-10
Last modified: 2026-08-19

Vendor information

Vendor: Microsoft
Product: Microsoft Visual Studio Code CoPilot Chat Extension

All Microsoft vulnerabilities

Score

8.8 High

EPSS

1.4%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 73.4.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Command Injection

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 0.27.0 and < 0.37.1
Fixed
0.37.1

Scoring System

CVSS v4.0

Not available

CVSS v3.1

8.8 High

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).