CVE-2026-82061: MongoDB

High severity, CVSS 8.1. EPSS: 0.5% chance of exploitation in the next 30 days.

A use-after-free security issue exists in the server's query execution memory tracking subsystem. An authenticated user with read privileges can trigger a write to freed heap memory through a sequence of standard database commands, leading to server process crash or potential memory corruption. No user interaction is required.

Affected products

• MongoDB MongoDB: from 8.3.0, before 8.3.9 (fixed in 8.3.9)

Published 2026-09-08. Last modified 2026-09-16.