PT-2026-30816 · Checkmk Gmbh · Checkmk

Alex Williams · Published 2026-04-07 · Updated 2026-04-07 · CVE-2026-3466

NVD

CVSS v4.0

8.5

High

AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-3466

Affected Products

Checkmk

References · 2

• https://checkmk.com/werk/19033 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-3466 · Security Note