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Fencer Vulns
medium 6.5

CVE-2020-7926 json

Specific query can cause a DoS against MongoDB Server

published 2020-11-23 5 y ago modified 2026-09-08 2 mo ago also BIT-mongodb-2020-7926 , EUVD-2020-28856

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami mongodb 4.4.1
  • MongoDB Inc. MongoDB Server 4.4.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-7926 updated cvss 6.5

mongodb: Denial of service via crafted queries which violates an invariant in the server selection subsystem

  • Red Hat OpenStack Platform 10 (Newton) mongodb, mongodb-server
    affected: no fix planned “Out of support scope”
  • Red Hat Advanced Cluster Management for Kubernetes 2 mongodb Red Hat Software Collections rh-mongodb36-mongodb, rh-mongodb36-mongodb-test, rh-mongodb36-mongodb-server, rh-mongodb36-mongodb-syspaths, rh-mongodb36-mongodb-server-syspaths Red Hat Update Infrastructure 3 for Cloud Providers mongodb
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.41% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.0 AV:N/AC:L/Au:S/C:N/I:N/A:P
OSV 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
bitnami mongodb
>=4.4.0, <4.4.1
4.4.1

Affected products

  • MongoDB Inc. MongoDB Server

Classification

Weakness
  • CWE-755 Improper Handling of Exceptional Conditions
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.