CVE-2026-62361: Knadh Listmonk

Medium severity, CVSS 5.5. EPSS: 0.4% chance of exploitation in the next 30 days.

listmonk is a standalone, self-hosted, newsletter and mailing list manager. Prior to 6.2.0, listmonk’s GET /api/subscribers/export endpoint injects the user-controlled query parameter into QuerySubscribersForExport in internal/core/subscribers.go without calling validateQueryTables, unlike GET /api/subscribers, allowing an authenticated user with subscribers:sql_query and subscribers:get_all to read arbitrary database tables such as users and settings and execute data-modifying PostgreSQL CTEs. This issue is fixed in version 6.2.0.

Affected products

• Knadh Listmonk: before 6.2.0 (fixed in 6.2.0)

Published 2026-07-15. Last modified 2026-07-16.