# CVE-2026-33456

## Summary

- **CVE ID:** CVE-2026-33456
- **Severity:** MEDIUM
- **CVSS Score:** 5.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-140
- **Published:** Apr 10, 2026
- **Last Modified:** Apr 14, 2026

## Description

Livestatus injection in the notification test mode in Checkmk <2.5.0b4 and <2.4.0p26 allows an authenticated user with access to the notification test page to inject arbitrary Livestatus commands via a crafted service description.

## Affected Products

- Checkmk GmbH — Checkmk (2.5.0)
- Checkmk GmbH — Checkmk (2.4.0)

## References

- [CNA](https://checkmk.com/werk/17989)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.20%
- **EPSS Percentile:** 9.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._