What is CVE-2026-24096?

CVE-2026-24096 is a high-severity vulnerability in Checkmk, classified under Improper Handling of Insufficient Permissions or Privileges. CVSS score: 8.8/10. Published 2026-04-01.

How severe is CVE-2026-24096?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Checkmk

CVE-2026-24096

Insufficient permission validation on multiple REST API Quick Setup endpoints in Checkmk 2.5.0 (beta) before version 2.5.0b2 and 2.4.0 before version 2.4.0p25 allows low-privileged users to perform unauthorized actions or obtain sensitive information

Published 2026-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (13.1th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Checkmk — versions 2.4.0, 2.5.0
Checkmk Gmbh — versions 2.5.0b1, 2.4.0

Weakness classification (CWE)

CWE-280 — Improper Handling of Insufficient Permissions or Privileges

References

checkmk.com/werk/18989 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-24096?: CVE-2026-24096 is a high-severity vulnerability in Checkmk, classified under Improper Handling of Insufficient Permissions or Privileges. CVSS score: 8.8/10. Published 2026-04-01.
How severe is CVE-2026-24096?: High severity. CVSS v3 base score is 8.8 out of 10.