Vulnerability · Published Feb 10, 2026 · Assigned by microsoft
CVE-2026-21518GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability
High 8.8
In plain English
A high-severity command injection in Microsoft Visual Studio Code CoPilot Chat Extension from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.4%top 26.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Microsoft Visual Studio Code CoPilot Chat Extension | 0.27.0 – before 0.37.1 |
| Microsoft | Visual Studio Code | 1.0.0 – before 1.110.1 |
Weakness: CWE-77 · 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
References
- GitHub Copilot and Visual Studio Code Security Feature Bypass Vulnerability vendor-advisory, patch