User may trigger invariant when allowed to send commands directly to shards

published 2021-11-24 4 y ago modified 2026-09-08 2 mo ago also BIT-mongodb-2021-32037 , EUVD-2021-18903

cvss: 6.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.2%; EPSS 1.2% chance of exploitation in 30 days, percentile 69%
public exploits: 0; none known

An authorized user may trigger an invariant which may result in denial of service or server exit if a relevant aggregation request is sent to a shard. Usually, the requests are sent via mongos and special privileges are required in order to know the address of the shards and to log in to the shards of an auth enabled environment. This issue affects MongoDB Server v5.0 versions prior to and including 5.0.2.

Patch / fix

fixed in 1

bitnami mongodb 5.0.3

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-2021-32037 updated 2025-11-21 cvss 6.5

mongodb: Using $sample can trigger invariant when connecting directly to shards

Red Hat OpenStack Platform 10 (Newton) mongodb, mongodb-server
affected: workaround, no fix planned “Out of support scope”
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

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-01-24)

Exploit prediction

1.24% chance of exploitation in the next 30 days, higher than 69% 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	>=5.0.0, <5.0.3	5.0.3

Affected products

MongoDB Inc. MongoDB Server
mongodb mongodb

Classification

Weakness

CWE-617 Reachable Assertion

Technology feeds

MongoDB rss critical rss

References

jira.mongodb.org /browse/SERVER-59071
vendor-advisory, advisory
nvd.nist.gov /vuln/detail/CVE-2021-32037
web

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.

Summary