CVE-2023-23549: Checkmk

Low severity, CVSS 2.7. EPSS: 0.6% chance of exploitation in the next 30 days.

Improper Input Validation in Checkmk <2.2.0p15, <2.1.0p37, <=2.0.0p39 allows priviledged attackers to cause partial denial of service of the UI via too long hostnames.

Affected products

• Checkmk Checkmk: version 2.0.0 only; version 2.1.0 only; version 2.2.0 only

Published 2023-11-15. Last modified 2026-06-17.