CVE-2026-13061: MongoDB

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

An authenticated user may be able to view session metadata belonging to other users on the system through the $listSessions aggregation stage. This information is normally restricted to users with cluster-level administrative privileges, and includes active session identifiers, associated usernames, and activity timestamps.

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 8.3.0, before 8.3.7 (fixed in 8.3.7)

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