CVE-2026-3466 — MEDIUM (5.4)

Vulnerability 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 Score

5.4

MEDIUM

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Checkmk	Checkmk	2.2.0

Related Weaknesses (CWE)

CWE-79

References

https://checkmk.com/werk/19033Vendor Advisory
https://checkmk.com/werk/19583
https://www.vulncheck.com/advisories/checkmk-stored-cross-site-scripting-in-dashRelease NotesThird Party Advisory

FAQ

What is CVE-2026-3466?

CVE-2026-3466 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 attacke...

How severe is CVE-2026-3466?

CVE-2026-3466 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-3466?

Check the references section above for vendor advisories and patch information. Affected products include: Checkmk Checkmk.