What’s Vulnerable › Vulnerabilities
CVE-2018-20805: Invariant with $elemMatch
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-11-23 · updated 2026-06-17
- Weakness: CWE-834
Description
A user authorized to perform database queries may trigger denial of service by issuing specially crafted queries, which perform an $elemMatch . This issue affects MongoDB Server v4.0 versions prior to 4.0.5 and MongoDB Server v3.6 versions prior to 3.6.10.
Affected products
- MongoDB: from 3.6.0 before 3.6.10; from 4.0.0 before 4.0.5 — fixed in 3.6.10, 4.0.5
How to fix
Upgrade to a fixed version: MongoDB 3.6.10, 4.0.5. Check the vendor advisory for mitigations.
References
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