Medium severity · published Apr 7, 2026
CVE-2026-3466
Cross-site scripting in dashlet title
5.4
CVSS
0.2%
EPSS
No
On KEV
Description
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 2.5.0 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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CH
Checkmk · Checkmk GmbH
2.2.0; 2.3.0 before 2.3.0p46; 2.4.0 before 2.4.0p25; 2.5.0b1 before 2.5.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-3466
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-3466
Vendor Advisory
https://checkmk.com/werk/19033
checkmk.com
https://checkmk.com/werk/19583
Release Notes
https://www.vulncheck.com/advisories/checkmk-stored-cross-site-scripting-in-dashlet-title
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