CVE-2026-24097

The CVE affects Checkmk: vulnerable in 2.4.0 prior to 2.4.0p23 and 2.3.0 prior to 2.3.0p43 (2.2.0 is EOL). The issue is improper permission enforcement in the agent-receiver/register_existing endpoint, enabling authenticated users to enumerate existing hosts by observing differences in HTTP respo...