CVE-2026-2859

MEDIUM

4.3

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 unauthenticated users to enumerate existing hosts by observing different HTTP response codes in deploy_agent endpoint, which could lead to information disclosure.

CVE Details

CVSS v3.1 Score4.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published3/13/2026

Last Modified3/18/2026

Sourcenvd

Honeypot Sightings0

Affected Products

checkmk:checkmk

Weaknesses (CWE)

CWE-204

References

https://checkmk.com/werk/18994(security@checkmk.com)

IOC Correlations

No correlations recorded

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