EUVD Vulnerability Catalog

EUVD-2026-123350

Severity: CRITICAL Base Score: 9.4 CVSS Version: 4.0

Vulnerability Description

Argument injection in the Kubernetes special agent in Checkmk <2.5.0p19, <2.4.0p40, and 2.3.0 (EOL) allows a user with permission to edit rules in at least one folder to write files to arbitrary locations writable by the site user via crafted node roles in the "Exclude nodes based on their role" rule option, leading to code execution as the site user.

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Attack Requirements (AT): None

▪ Privileges Required (PR): Low

▪ User Interaction (UI): None

▪ Vulnerability Confidentiality Impact (VC): High

▪ Vulnerability Integrity Impact (VI): High

▪ Vulnerability Availability Impact (VA): High

▪ Subsequent Confidentiality Impact (SC): High

▪ Subsequent Integrity Impact (SI): High

▪ Subsequent Availability Impact (SA): High

Affected Vendors & Systems

Vendor Checkmk GmbH

References & Advisory Links

https://checkmk.com/werk/17994

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

Checkmk

EPSS Probability

0.38

Known Aliases

CVE-2026-121374 GHSA-p25x-4jr8-p5mr

Published On

2026-11-11

Last Updated

2026-11-14