{"id":"CVE-2026-33456","aliases":["EUVD-2026-21344","GHSA-hxwv-vc7p-p66g","UBUNTU-CVE-2026-33456"],"status":"published","title":"Potential livestatus injection in notification test","description":"Livestatus injection in the notification test mode in Checkmk \u003c2.5.0b4 and \u003c2.4.0p26 allows an authenticated user with access to the notification test page to inject arbitrary Livestatus commands via a crafted service description.","severity":{"version":"4.0","score":5.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.002,"percentile":0.0992,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-140"],"published":"2026-04-10T08:31:27Z","modified":"2026-10-28T02:30:59Z","affected":[{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"check-mk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.6p5-1","1.2.6p12-1","1.2.6p12-1ubuntu0.16.04.1","1.2.6p12-1ubuntu0.16.04.1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"check-mk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.8p16-1ubuntu0.1","1.2.8p16-1ubuntu0.2"]}],"products":[{"vendor":"checkmk","product":"checkmk"},{"vendor":"checkmk gmbh","product":"checkmk"}],"references":[{"url":"https://checkmk.com/werk/17989","tags":["vendor-advisory","Vendor Advisory","advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33456","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-hxwv-vc7p-p66g"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33456.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-33456","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33456","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-33456","title":"Potential livestatus injection in notification test","description":"Livestatus injection in the notification test mode in Checkmk \u003c2.5.0b4 and \u003c2.4.0p26 allows an authenticated user with access to the notification test page to inject arbitrary Livestatus commands via a crafted service 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