What is CVE-2020-7926?

CVE-2020-7926 is a medium-severity vulnerability in MongoDB, classified under Improper Handling of Exceptional Conditions. CVSS score: 6.5/10. Published 2020-11-23.

How severe is CVE-2020-7926?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in MongoDB

CVE-2020-7926

A user authorized to perform database queries may cause denial of service by issuing a specially crafted query which violates an invariant in the server selection subsystem. This issue affects MongoDB Server v4.4 versions prior to 4.4.1. Versions before 4.4 are not affected.

Published 2020-11-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.6th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 72nd percentile — 71.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

MongoDB
MongoDB Inc. Server — versions 4.4

Weakness classification (CWE)

CWE-755 — Improper Handling of Exceptional Conditions

References

jira.mongodb.org/browse/SERVER-50170 (Issue Tracking, Vendor Advisory)

Frequently asked questions

What is CVE-2020-7926?: CVE-2020-7926 is a medium-severity vulnerability in MongoDB, classified under Improper Handling of Exceptional Conditions. CVSS score: 6.5/10. Published 2020-11-23.
How severe is CVE-2020-7926?: Medium severity. CVSS v3 base score is 6.5 out of 10.