{"id":"CVE-2026-120495","aliases":["EUVD-2026-123351","GHSA-79m2-wqr8-q2wm"],"status":"published","title":"Arbitrary file write and code execution via crafted Synthetic Monitoring agent data","description":"Path traversal in the Synthetic Monitoring \"Robotmk\" test service of Checkmk \u003c2.5.0p19, \u003c2.4.0p40, 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.","severity":{"version":"4.0","score":9.4,"vector":"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","level":"critical","assessor":"cna","from":"cve"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-23"],"published":"2026-11-11T10:46:33Z","modified":"2026-11-11T12:31:47Z","products":[{"vendor":"checkmk gmbh","product":"checkmk"}],"references":[{"url":"https://checkmk.com/werk/22624","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-120495"},{"url":"https://github.com/advisories/GHSA-79m2-wqr8-q2wm"}],"sources":{"cve":[{"id":"CVE-2026-120495","title":"Arbitrary file write and code execution via crafted Synthetic Monitoring agent data","description":"Path traversal in the Synthetic Monitoring \"Robotmk\" test service of Checkmk \u003c2.5.0p19, \u003c2.4.0p40, 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.","status":"published","published":"2026-11-11T10:46:33.92Z","modified":"2026-11-11T10:46:33.92Z","cvss":[{"version":"4.0","score":9.4,"vector":"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","level":"critical","assessor":"cna"}],"cwes":["CWE-23"],"updated_at":"2026-11-11T11:26:45.2572Z"}],"euvd":[{"id":"EUVD-2026-123351","description":"Path traversal in the Synthetic Monitoring \"Robotmk\" test service of Checkmk \u003c2.5.0p19, \u003c2.4.0p40, 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.","status":"published","published":"2026-11-11T10:46:33Z","modified":"2026-11-11T10:46:33Z","cvss":[{"version":"4.0","score":9.4,"vector":"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","level":"critical"}],"updated_at":"2026-11-11T14:29:05.081199Z"}],"ghsa":[{"id":"GHSA-79m2-wqr8-q2wm","title":"Path traversal in the Synthetic Monitoring \"Robotmk\" test service of Checkmk \u003c2.5.0p19, \u003c2.4.0p40...","description":"Path traversal in the Synthetic Monitoring \"Robotmk\" test service of Checkmk \u003c2.5.0p19, \u003c2.4.0p40, 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.","status":"published","published":"2026-11-11T12:31:40Z","modified":"2026-11-11T12:31:47Z","cvss":[{"version":"4.0","score":9.4,"vector":"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/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","level":"critical"}],"cwes":["CWE-23"],"updated_at":"2026-11-11T12:34:05.637143Z"}],"nvd":[{"id":"CVE-2026-120495","description":"Path traversal in the Synthetic Monitoring \"Robotmk\" test service of Checkmk \u003c2.5.0p19, \u003c2.4.0p40, 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.","status":"published","published":"2026-11-11T11:17:13.433Z","modified":"2026-11-11T11:17:13.547Z","cvss":[{"version":"4.0","score":9.4,"vector":"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/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","level":"critical","assessor":"secondary"}],"cwes":["CWE-23"],"updated_at":"2026-11-11T14:25:07.037694Z"}]}}