What’s Vulnerable › Vulnerabilities

CVE-2020-7928: Improper neutralization of null byte leads to read overrun

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% 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-158

Description

A user authorized to perform database queries may trigger a read overrun and access arbitrary memory by issuing specially crafted queries. This issue affects MongoDB Server v4.4 versions prior to 4.4.1; MongoDB Server v4.2 versions prior to 4.2.9; MongoDB Server v4.0 versions prior to 4.0.20 and MongoDB Server v3.6 versions prior to 3.6.20.

Affected products

• MongoDB: from 3.6.0 before 3.6.20; from 4.0.0 before 4.0.20; from 4.2.0 before 4.2.9; from 4.4.0 before 4.4.1; from 4.5.0 before 4.5.1 — fixed in 3.6.20, 4.0.20, 4.2.9, 4.4.1, 4.5.1

How to fix

Upgrade to a fixed version: MongoDB 3.6.20, 4.0.20, 4.2.9, 4.4.1. Check the vendor advisory for mitigations.

References

• https://jira.mongodb.org/browse/SERVER-49404
• https://jira.mongodb.org/browse/SERVER-49404

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