CVE-2026-84967

CVE-2026-84967

A component of the MongoDB extension for Visual Studio Code does not neutralize special characters in a connection string before that value is placed into a command line the extension composes for an integrated terminal. An unauthenticated remote unauthorized-user who persuades a developer to accept a user-supplied connection target, and then to open the extension's shell feature, can place characters of the unauthorized-user’s choosing into that command line. No privileges on the developer's machine are required, but several user actions are. The confirmation the developer sees does not display the supplied text.

Vulnerability class: Command Injection (OS Command Injection)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-84967?
CVE-2026-84967 is a medium-severity vulnerability, classified under OS Command Injection. CVSS score: 4.3/10. Published 2026-09-03.
How severe is CVE-2026-84967?
Medium severity. CVSS v3 base score is 4.3 out of 10.