CVE-2026-81381: GitHub Copilot and Visual Studio Code Information Disclosure Vulnerability

Overview

Severity

Medium (CVSS 6.5)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Sep

Released

2026-09-08

Description

Insufficiently protected credentials in GitHub Copilot and Visual Studio Code allows an unauthorized attacker to disclose information over a network.

FAQ

What type of information could be disclosed by this vulnerability? This vulnerability could expose a sign-in access token for a user’s work account. If disclosed, that token could allow access to data and services that the user is authorized to use, potentially including sensitive organizational information.

Affected Products (1)

Developer Tools

• Visual Studio Code

Security Updates (1)

• Release Notes

Acknowledgments

<a href="https://x.com/sebmorin1">Sebastien Morin</a> with smsecurity

Revision History

• 2026-09-08: Information published.