CVE-2026-13065: MongoDB

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A user with read-only privileges is able to craft an aggregation pipeline using the $linearFill window function operator with a specific sortBy expression type to cause the mongod process to terminate abnormally, resulting in denial of service. The issue stems from insufficient validation of sort specifications during execution.

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 2026-08-05.