{"id":"CVE-2025-23390","title":"A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the `known_hosts` file","summary":"A vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the `known_hosts` file. This could allow the exe…","severity":"medium","cvss":6.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-295"],"vendor":"SUSE","product":"github.com/rancher/fleet","affected":["github.com/rancher/fleet >= 0.9.0-rc.1 < 0.10.12","github.com/rancher/fleet >= 0.11.0 < 0.11.7","github.com/rancher/fleet >= 0.12.0 < 0.12.2"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T09:17:14.190","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-23390","references":[{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390","label":"meissner@suse.de"},{"url":"https://github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8","label":"meissner@suse.de"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T08:58:33.101Z","slug":"CVE-2025-23390","body":"## Overview\n\nA vulnerability has been identified within Fleet where, by default, Fleet will automatically trust a remote server’s certificate when connecting through SSH if the certificate isn’t set in the `known_hosts` file. This could allow the execution of a man-in-the-middle (MitM) attack against Fleet. In case the server that is being connected to has a trusted entry in the known_hosts file, then Fleet will correctly check the authenticity of the presented certificate.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":34.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}