CVE-2026-3466

8.5 highEPSS 0.2%

High (8.5) in checkmk checkmk. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.5 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N

CVSS 3.1

5.4 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 13% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-04-07
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

checkmk:checkmk

References

https://checkmk.com/werk/19033
https://checkmk.com/werk/19583
https://www.vulncheck.com/advisories/checkmk-stored-cross-site-scripting-in-dashlet-title

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