CVE-2026-13056: MongoDB

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Using expressions that generate large arrays it is possible to craft a query that creates very large intermediate objects in memory, causing the server to crash with OOM error.

Affected products

• MongoDB MongoDB: from 8.0.0, before 8.0.28 (fixed in 8.0.28); from 8.3.0, before 8.3.7 (fixed in 8.3.7)

Published 2026-07-22. Last modified 2026-08-05.