CVE-2026-13074: MongoDB

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

An unauthenticated remote client can cause excessive CPU consumption on a MongoDB server by sending a specific combination of parameters to the awaitable hello command in exhaust mode. The server's handling of this combination results in a response loop that bypasses normal throttling, allowing a small number of connections to degrade server availability.

Affected products

• MongoDB MongoDB: from 7.0.0, before 7.0.39 (fixed in 7.0.39); from 8.0.0, before 8.0.28 (fixed in 8.0.28); from 8.2.0, before 8.2.12 (fixed in 8.2.12); from 8.3.0, before 8.3.7 (fixed in 8.3.7)

Published 2026-07-22. Last modified 2026-08-18.