Arbitrary file write and code execution via crafted Synthetic Monitoring agent data
Not on CISA's list of exploited flaws, and not in the news we track.
9.4of 10, critical
Reading the vendor advisory
Fix it in your code
Each opens with a short prompt that points at Global Hack Map's public runbook for CVE-2026-120495. Nothing runs until you send it.
Path traversal in the Synthetic Monitoring "Robotmk" test service of Checkmk <2.5.0p19, <2.4.0p40, and 2.3.0 (EOL) allows an attacker who controls the agent output of a monitored host's check output for a host to inject a crafted robot output to define the contents and location for the generated HTML log, leading to code execution as the site user.
You are affected if
The fix