High severity · published Apr 1, 2026
CVE-2026-24096
Insufficient permission validation on multiple REST API Quick Setup endpoints
8.8
CVSS
0.2%
EPSS
No
On KEV
Description
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
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 15% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
Checkmk · Checkmk GmbH
2.5.0b1 before 2.5.0b2; 2.4.0 before 2.4.0p25 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-24096
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-24096
Vendor Advisory
https://checkmk.com/werk/18989
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