What is CVE-2026-33455?

CVE-2026-33455 is a medium-severity vulnerability in Checkmk, classified under CWE-140. CVSS score: 6.3/10. Published 2026-04-10.

How severe is CVE-2026-33455?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in Checkmk

CVE-2026-33455

Livestatus injection in the monitoring quicksearch in Checkmk <2.5.0b4 allows an authenticated attacker to inject livestatus commands via the search query due to insufficient input sanitization in search filter plugins.

EPSS: 0.002 (7.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

Affected products

Checkmk — versions 2.5.0
Checkmk Gmbh — versions 2.5.0

Weakness classification (CWE)

CWE-140

References

security@checkmk.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-33455?: CVE-2026-33455 is a medium-severity vulnerability in Checkmk, classified under CWE-140. CVSS score: 6.3/10. Published 2026-04-10.
How severe is CVE-2026-33455?: Medium severity. CVSS v3 base score is 6.3 out of 10.