Checkmk Vulnerabilities

Comprehensive security vulnerability database for Checkmk products

Last updated: Mar 13, 2026
Total CVEs

3

Critical

0

With Exploits

3

Last 30 Days

1

Severity Distribution

Critical0
0%
High1
33%
Medium2
67%
Low0
0%
DescriptionVendor / ProductExploit Status
CVE-2026-240975.3

This vulnerability allows an attacker who is already logged into Checkmk to find out details about existing hosts by looking at different responses from the system. It occurs because the system doesn't properly check permissions, making it easier for these users to access sensitive information.

checkmkcheckmk
Exploit Available
25 days agoMar 13, 2026
CVE-2026-31035.3

A low-privileged user can exploit a flaw in Checkmk to unintentionally delete important data. This issue affects specific older versions of the software, so users running those versions should update to avoid potential data loss.

checkmkcheckmk
Exploit Available
about 1 month agoMar 4, 2026
CVE-2025-649997.3

This vulnerability allows an attacker to inject malicious JavaScript into the monitoring logs of Checkmk, which can then be accessed through a specially crafted phishing link. To exploit this, the attacker needs to manipulate the output from a monitored host, making it essential for them to have some level of access to the system.

checkmkcheckmk
Exploit Available
about 1 month agoFeb 26, 2026

About Checkmk Security

This page tracks all publicly disclosed security vulnerabilities (CVEs) affecting Checkmk products. Our database is updated in real-time from the National Vulnerability Database (NVD) and enriched with exploit information from GitHub and other security research sources.

Each CVE listing includes CVSS severity scores, exploit availability status, AI-powered vulnerability summaries, and links to official patches and security advisories.