Specially crafted query may result in a denial of service of mongod (MongoDB Inc. MongoDB Server)

CVE-2021-20326

MEDIUM 6.5

At a glance

Source: NVD
EPSS: EPSS 0.95 % · percentile 61 (2026-10-31)
State: PUBLISHED
Published: 2021-04-30 09:10 UTC
Updated: 2024-11-19 14:57 UTC
Assigner: mongodb
NVD status: Modified

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Description

A user authorized to performing a specific type of find query may trigger a denial of service. This issue affects MongoDB Server v4.4 versions prior to 4.4.4.

Weaknesses (CWE)

CWE-20 — Improper Input Validation
CWE-732 — Incorrect Permission Assignment for Critical Resource

References

https://jira.mongodb.org/browse/SERVER-53929

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	mongodb
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	NVD · cna@mongodb.com (Secondary)
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	NVD · nvd@nist.gov (Primary)
CVSS 2.0	MEDIUM 4.0	AV:N/AC:L/Au:S/C:N/I:N/A:P	NVD · nvd@nist.gov (Primary)

European references

ENISA EUVD · EUVD-2021-7749
GCVE · GCVE-0-2021-20326

CERT-FR advisories

CERTFR-2021-AVI-333 — Vulnérabilité dans MongoDB Server · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:mongodb:mongodb:*:*:*:*:*:*:*:* ≥ 4.4.0 < 4.4.4

Affected products

Product	Versions
MongoDB Inc. · MongoDB Server	affected 4.4 < 4.4.4

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD