{"id":"CVE-2026-15937","title":"Improper certificate validation in Checkmk <2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoi…","summary":"Improper certificate validation in Checkmk <2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoi…","severity":"none","cwe":["CWE-295"],"published":"2026-09-04","updated":"2026-09-08","sourceUpdated":"2026-09-08T14:10:24.113","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-15937","references":[{"url":"https://checkmk.com/werk/19735","label":"security@checkmk.com"}],"tags":["nvd"],"epss":0.0014,"epssPercentile":0.03718,"ingestedAt":"2026-09-08T15:33:26.959Z","slug":"CVE-2026-15937","body":"## Overview\n\nImproper certificate validation in Checkmk <2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoints do not verify that the certificate was issued by their own root certificate.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}