What is CVE-2026-23653?

CVE-2026-23653 is a medium-severity vulnerability in Microsoft GitHub Copilot Chat, classified under Command Injection. CVSS score: 5.7/10. Published 2026-04-14.

How severe is CVE-2026-23653?

Medium severity. CVSS v3 base score is 5.7 out of 10.

RCE in Microsoft GitHub Copilot Chat

CVE-2026-23653

Improper neutralization of special elements used in a command ('command injection') in GitHub Copilot and Visual Studio Code allows an authorized attacker to disclose information over a network.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-04-14 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.007 (54.0th percentile), scored 2026-10-22.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 54.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Microsoft GitHub Copilot Chat
Microsoft Visual Studio Code Copilot Chat Extension — versions 0.27.0

Weakness classification (CWE)

CWE-77 — Command Injection

References

GitHub Copilot and Visual Studio Code Information Disclosure Vulnerability (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-23653?: CVE-2026-23653 is a medium-severity vulnerability in Microsoft GitHub Copilot Chat, classified under Command Injection. CVSS score: 5.7/10. Published 2026-04-14.
How severe is CVE-2026-23653?: Medium severity. CVSS v3 base score is 5.7 out of 10.