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

What is CVE-2020-7928?

CVE-2020-7928 is a medium-severity memory corruption vulnerability in Mongodb Mongodb, published on 23 Nov 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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.

Weakness: CWE-158

Which versions are affected by CVE-2020-7928?

1 open source package ship an affected version, including mongodb. It affects 1 product.

Products include Mongodb Mongodb.

How do I fix CVE-2020-7928?

Upgrade mongodb to a fixed version for your release line: 3.6.20, 4.0.20, 4.2.9 or 4.4.1.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-7928 being exploited?

There is no known exploitation of CVE-2020-7928 in the wild and no public exploit code.

Other vulnerabilities in Mongodb Mongodb

• CVE-2025-14847 MongoDB and MongoDB Server Improper Handling of Length Parameter Inconsistency Exploited High 8.7
• CVE-2026-82067 Auth bypass in MongoDB Server Critical 9.2
• CVE-2026-13072 MongoDB Improper Input Validation in Compute Mode External Data Processing Leading to Memory Corruption Critical 9.2
• CVE-2017-15535 Denial of service in n/a Critical 9.1
• CVE-2026-18691 Improper Authentication in MongoDB Intra-Cluster Connections Allows Credential Exposure Critical 9.0

All Mongodb Mongodb vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BIT-mongodb-2020-7928, GHSA-5mwc-rp6j-mw6r, UBUNTU-CVE-2020-7928.