What’s Vulnerable › Vulnerabilities
CVE-2020-7929: Specially crafted regex query can cause DoS
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 1.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2021-03-01 · updated 2026-06-17
- Weakness: CWE-185
Description
A user authorized to perform database queries may trigger denial of service by issuing specially crafted query contain a type of regex. This issue affects MongoDB Server v3.6 versions prior to 3.6.21 and MongoDB Server v4.0 versions prior to 4.0.20.
Affected products
- MongoDB: from 3.6.0 before 3.6.21; from 4.0.0 before 4.0.20 — fixed in 3.6.21, 4.0.20
How to fix
Upgrade to a fixed version: MongoDB 3.6.21, 4.0.20. Check the vendor advisory for mitigations.
References
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