CVE-2019-20925: MongoDB

High severity, CVSS 7.5. EPSS: 1.7% chance of exploitation in the next 30 days.

An unauthenticated client can trigger denial of service by issuing specially crafted wire protocol messages, which cause the message decompressor to incorrectly allocate memory. This issue affects MongoDB Server v4.2 versions prior to 4.2.1; MongoDB Server v4.0 versions prior to 4.0.13; MongoDB Server v3.6 versions prior to 3.6.15 and MongoDB Server v3.4 versions prior to 3.4.24.

Affected products

• MongoDB MongoDB: from 3.4.0, before 3.4.24 (fixed in 3.4.24); from 3.6.0, before 3.6.15 (fixed in 3.6.15); from 4.0.0, before 4.0.13 (fixed in 4.0.13); from 4.2.0, before 4.2.1 (fixed in 4.2.1)

Published 2020-11-24. Last modified 2026-06-17.