CVE-2026-8593: Checkmk GmbH Checkmk

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Improper permission enforcement in Checkmk versions 2.5.0 before 2.5.0p9, 2.4.0 before 2.4.0p34, 2.3.0 before 2.3.0p49, and 2.2.0 (EOL) allows users without permissions to view and modify BI packs and rules

Affected products

• Checkmk GmbH Checkmk: from 2.5.0, before 2.5.0p9 (fixed in 2.5.0p9); from 2.4.0, before 2.4.0p34 (fixed in 2.4.0p34); from 2.3.0, before 2.3.0p49 (fixed in 2.3.0p49)

Published 2026-07-21. Last modified 2026-07-22.