{"id":"CVE-2025-23390","summary":"Fleet doesn’t validate a server’s certificate when connecting through SSH","details":"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 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.","aliases":["GHSA-xgpc-q899-67p8","GO-2025-3649"],"modified":"2026-10-16T02:46:35.631189996Z","published":"2026-10-15T08:16:46.096Z","related":["openSUSE-SU-2025:15059-1"],"database_specific":{"cna_assigner":"suse","cwe_ids":["CWE-295"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23390.json"},"references":[{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/23xxx/CVE-2025-23390.json"},{"type":"ADVISORY","url":"https://github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-23390"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/rancher/fleet","events":[{"introduced":"0d26f206b3c521fdb78218285ffb69a91c6e5c81"},{"fixed":"1dd9dd2074db8f1f9478b9b2fb046eba0a2539e4"},{"introduced":"3e91ed3fb600e6499107751f7c3c0ab255f09640"},{"fixed":"4809cf03c8926d834067bf1111ea24df6b875c32"},{"introduced":"3d1fa6c06ff392c9fa66ca2f46831e2dae23bc16"},{"fixed":"fcb09948fb937f043ab421b2b7ef03d7cbcce02b"}],"database_specific":{"extracted_events":[{"introduced":"0.9.0-rc.1"},{"fixed":"0.10.12"},{"introduced":"0.11.0"},{"fixed":"0.11.7"},{"introduced":"0.12.0"},{"fixed":"0.12.2"}],"source":"AFFECTED_FIELD"}}],"versions":["v0.10.11-rc.1","v0.10.11","pkg/apis/v0.10.11-rc.1","pkg/apis/v0.10.11","v0.11.6-rc.2","v0.11.6","pkg/apis/v0.11.6","v0.12.1-rc.1","v0.12.1","pkg/apis/v0.12.1-rc.1","pkg/apis/v0.12.1","v0.11.6-rc.1","pkg/apis/v0.11.6-rc.1","v0.10.11-beta.2","v0.11.6-beta.2","v0.12.1-beta.2","v0.10.11-beta.1","pkg/apis/v0.10.11-beta.1","v0.11.6-beta.1","pkg/apis/v0.11.6-beta.1","v0.12.1-beta.1","pkg/apis/v0.12.1-beta.1","v0.10.10","v0.11.5","v0.12.0-rc.5","v0.12.0","pkg/apis/v0.12.0-rc.5","pkg/apis/v0.12.0","v0.10.9-rc.2","v0.10.9","v0.11.4","v0.11.4-rc.2","v0.11.4-rc.1","v0.10.9-rc.1","v0.11.3-rc.2","v0.11.3","pkg/apis/v0.11.3","v0.10.8-rc.2","v0.10.8","pkg/apis/v0.10.8","v0.10.8-rc.1","v0.11.3-rc.1","v0.10.8-beta.1","pkg/apis/v0.10.8-beta.1","v0.11.3-beta.1","pkg/apis/v0.11.3-beta.1","v0.10.7-rc.2","v0.10.7","v0.11.2-rc.2","v0.11.2","v0.11.2-rc.1","v0.11.1-rc.3","v0.11.1-rc.2","v0.11.1-rc.1","v0.11.1","v0.10.7-rc.1","v0.10.6-rc.1","v0.10.6","v0.11.0-rc.4","v0.11.0","pkg/apis/v0.11.0-rc.4","pkg/apis/v0.11.0","v0.10.5-rc.3","v0.10.5","v0.10.4-rc.4","v0.10.4","v0.10.5-rc.2","v0.10.5-rc.1","v0.10.4-rc.3","v0.10.4-rc.2","v0.10.4-rc.1","v0.10.2-rc.4","v0.10.2","v0.10.3-rc.1","v0.10.2-rc.3","v0.10.2-rc.2","v0.10.2-rc.1","v0.10.1-rc.3","v0.10.1","v0.10.0-rc.21","pkg/apis/v0.10.0-rc.21","v0.10.0-rc.20","pkg/apis/v0.10.0-rc.20","v0.10.0-rc.19","pkg/apis/v0.10.0-rc.19","v0.10.0-rc.18","v0.10.0-rc.17","v0.10.0-rc.16","pkg/apis/v0.10.0-rc.16","v0.10.0-rc.15","pkg/apis/v0.10.0-rc.15","v0.10.0-rc.14","pkg/apis/v0.10.0-rc.14","pkg/apis/v0.10.0-rc.13","v0.10.0-rc.13","v0.10.0-rc.12","v0.10.0-rc.11","v0.10.0-rc.10","v0.10.0-rc.9","v0.10.0-rc.8","v0.10.0-rc.7","v0.10.0-rc.6","v0.10.0-rc.5","v0.10.0-rc.4","pkg/apis/v0.10.0-rc.4","v0.10.0-rc.3","v0.10.0-rc.2","v0.10.0-rc.1","v0.9.0-rc.4","v0.9.0-rc.3","v0.9.0-rc.2","v0.9.0-rc.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-23390.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L"}]}