Vulnerability Details CVE-2026-3466
Insufficient sanitization of dashboard dashlet title links in Checkmk 2.2.0 (EOL), Checkmk 2.3.0 before 2.3.0p46, Checkmk 2.4.0 before 2.4.0p25, and Checkmk 2.5.0 (beta) before 2.5.0b3 allows an attacker with dashboard creation privileges to perform stored cross-site scripting (XSS) attacks by tricking a victim into clicking a crafted dashlet title link on a shared dashboard.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 16.3%
CVSS Severity
CVSS v3 Score 5.4
References
Products affected by CVE-2026-3466
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cpe:2.3:a:checkmk:checkmk:2.2.0
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cpe:2.3:a:checkmk:checkmk:2.3.0
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cpe:2.3:a:checkmk:checkmk:2.4.0
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cpe:2.3:a:checkmk:checkmk:2.5.0