What is CVE-2026-120823?

CVE-2026-120823 is a medium-severity vulnerability in MongoDB Server, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-11-10.

How severe is CVE-2026-120823?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Auth bypass in MongoDB Server

CVE-2026-120823

A missing authorization check in the aggregation framework of MongoDB Server may allow a user holding any valid credentials, including an account with no assigned roles, to read deployment-wide query configuration data that is otherwise restricted to a cluster-level privilege. This may result in unintended access to configuration and schema information.

Vulnerability class: Broken Access Control

Published 2026-11-10 · last modified 2026-11-10.

CVSS v3 metric

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

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

MongoDB Server

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

jira.mongodb.org/browse/SERVER-136150

Frequently asked questions

What is CVE-2026-120823?: CVE-2026-120823 is a medium-severity vulnerability in MongoDB Server, classified under Missing Authorization. CVSS score: 4.3/10. Published 2026-11-10.
How severe is CVE-2026-120823?: Medium severity. CVSS v3 base score is 4.3 out of 10.