CVE-2026-121374
Published:November 11, 2026
Updated:November 12, 2026
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.
Affected Packages
https://github.com/Checkmk/checkmk.git (GITHUB):
Affected version(s) >=v2.1.0b5 <v2.4.0p40 || >=v2.2.0b1-rc1 <v2.4.0p40 || >=v2.3.0b1-rc1 <v2.4.0p40 || >=v2.4.0b1-rc1 <v2.4.0p40Fix Suggestion:
Update to version v2.4.0p40https://github.com/Checkmk/checkmk.git (GITHUB):
Affected version(s) >=v2.5.0b1-rc1 <v2.5.0p19Fix Suggestion:
Update to version v2.5.0p19Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.4
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
9.9
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Neutralization of Argument Delimiters in a Command
EPSS
Base Score:
0.38