CVE catalog
CVE-2026-2859
UBUNTU-CVE-2026-2859
- Severity
- Unknown
- Published
- Updated
- Source
- [NVD] · [CVE record]
- EPSS
- 0.20% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Ubuntu | check-mk | pro | 1.2.6p5-1 | vulnerable |
| Ubuntu | check-mk | pro | 1.2.6p12-1 | vulnerable |
| Ubuntu | check-mk | pro | 1.2.6p12-1ubuntu0.16.04.1 | vulnerable |
| Ubuntu | check-mk | pro | 1.2.6p12-1ubuntu0.16.04.1+esm1 | vulnerable |
| Ubuntu | check-mk | 18.04 | 1.2.8p16-1ubuntu0.1 | vulnerable |
| Ubuntu | check-mk | 18.04 | 1.2.8p16-1ubuntu0.2 | vulnerable |
Fixed-version evidence
OpenFactory catalog packages
No matching packages in this catalog.
Observed: