CVE-2018-20802: medium-severity vulnerability in MongoDB Server
Post-auth queries on compound index may crash mongod
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 1.6%
A user authorized to perform database queries may trigger denial of service by issuing specially crafted queries with compound indexes affecting QueryPlanner. This issue affects MongoDB Server v3.6 versions prior to 3.6.9 and MongoDB Server v4.0 versions prior to 4.0.3.
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-2020-7928MEDIUMImproper neutralization of null byte leads to read overrunEPSS 1.4%CVE-2018-20803MEDIUMInfinite loop in aggregation expressionEPSS 1.4%