medium4.3
CVE-2026-2859
Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows unauthenticated users to enumerate exi…
Impact
Improper permission enforcement in Checkmk versions 2.4.0 before 2.4.0p23, 2.3.0 before 2.3.0p43, and 2.2.0 (EOL) allows unauthenticated users to enumerate existing hosts by observing different HTTP response codes in deploy_agent endpoint, which could lead to information disclosure.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Checkmk | Checkmk | Versions 2.2.0, 2.3.0, 2.4.0 |