CVE-2026-21518highCWE-77

CVE-2026-21518: high-severity vulnerability in Microsoft Visual Studio Code

GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability

Published · Updated

Follow this CVE+ Monitor Visual Studio Code+ Monitor Microsoft Visual Studio Code CoPilot Chat Extension

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 1.4%
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.
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
Affected products
Microsoft · Microsoft Visual Studio Code CoPilot Chat ExtensionMicrosoft · Visual Studio Code
Related CVEs — Microsoft Visual Studio Code

In the same product, most dangerous first.

CVE-2022-41034HIGHVisual Studio Code Remote Code Execution VulnerabilityEPSS 67.5%CVE-2022-30129HIGHVisual Studio Code Remote Code Execution VulnerabilityEPSS 41.6%CVE-2019-0728—CVE-2019-0728EPSS 27.7%CVE-2021-43891HIGHVisual Studio Code Remote Code Execution VulnerabilityEPSS 11.7%CVE-2020-1416—CVE-2020-1416EPSS 5.9%CVE-2020-16881HIGHVisual Studio JSON Remote Code Execution VulnerabilityEPSS 5.4%