CVE-2026-24097 - Vulnerability Details - OpenCVE

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 authenticated users to enumerate existing hosts by observing different HTTP response codes in agent-receiver/register_existing endpoint, which could lead to information disclosure.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00042.

Exploitation none

Automatable yes

Technical Impact partial

Vendors	Products
Checkmk	Checkmk

No data.

No data.

No data.

References

Link	Providers
https://checkmk.com/werk/18993

History

Fri, 13 Mar 2026 16:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Fri, 13 Mar 2026 10:00:00 +0000

Type	Values Removed	Values Added
Description		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 authenticated users to enumerate existing hosts by observing different HTTP response codes in agent-receiver/register_existing endpoint, which could lead to information disclosure.
Title		Authenticated Host Enumeration via Observable Response Discrepancy on Agent Register Existing Endpoint
First Time appeared		Checkmk Checkmk checkmk
Weaknesses		CWE-204
CPEs		cpe:2.3:a:checkmk:checkmk:::::::: cpe:2.3:a:checkmk:checkmk:2.2.0:::::::*
Vendors & Products		Checkmk Checkmk checkmk
References		https://checkmk.com/werk/18993
Metrics		cvssV4_0 `{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}`

MITRE

Status: PUBLISHED

Assigner: Checkmk

Published: 2026-03-13T09:40:05.075Z

Updated: 2026-03-13T15:56:41.327Z

Reserved: 2026-01-21T14:39:24.128Z

Link: CVE-2026-24097

Vulnrichment

Updated: 2026-03-13T15:56:36.726Z

NVD

No data.

Redhat

No data.

OpenCVE Enrichment

No data.

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