What is CVE-2026-18690?

CVE-2026-18690 is a high-severity vulnerability in Mongodb Server, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-08-11.

How severe is CVE-2026-18690?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Mongodb Server

CVE-2026-18690

An issue in MongoDB Server could allow an authenticated user with a limited database-scoped role to perform an action against protected system collections that their assigned privileges should not permit. This could result in critical syst…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Mongodb Server — versions 8.3.0, 8.0, 7.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

cna@mongodb.com

Frequently asked questions

What is CVE-2026-18690?: CVE-2026-18690 is a high-severity vulnerability in Mongodb Server, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-08-11.
How severe is CVE-2026-18690?: High severity. CVSS v3 base score is 8.1 out of 10.