CVE-2021-20326: medium-severity vulnerability in MongoDB Server
Specially crafted query may result in a denial of service of mongod
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.9%
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
MongoDB Inc. · MongoDB ServerRelated CVEs — MongoDB Server
In the same product, most dangerous first.
CVE-2025-14847HIGHZlib compressed protocol header length confusion may allow memory readEPSS 83.2%KEVCVE-2021-32040MEDIUMLarge aggregation pipelines with a specific stage can crash mongod under default configurationEPSS 2.0%CVE-2020-7925HIGHDenial of Service when processing malformed Role namesEPSS 1.7%CVE-2019-20925HIGHDenial of service via malformed network packetEPSS 1.7%CVE-2018-20802MEDIUMPost-auth queries on compound index may crash mongodEPSS 1.6%CVE-2020-7928MEDIUMImproper neutralization of null byte leads to read overrunEPSS 1.4%