{"identifier":"CVE-2025-23390","cve":{"id":"CVE-2025-23390","description":"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.","published":"2026-10-15T09:17:14.190000+00:00","modified":"2026-10-19T22:10:00.130000+00:00","status":"Awaiting Analysis","score":6.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","cvss_version":"3.1","affected":[],"weaknesses":["CWE-295"],"references":[{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390","source":"meissner@suse.de"},{"url":"https://github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8","source":"meissner@suse.de"}],"kev":null,"kev_checked":true,"metrics":{"cvssMetricV31":[{"source":"meissner@suse.de","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","baseScore":6.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW"},"exploitabilityScore":2.8,"impactScore":3.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-15T14:21:23.550366Z","id":"CVE-2025-23390","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[],"source":"nvd","retrieved_at":"2026-10-28T10:22:36.520337+00:00","exploited":false,"kev_stale":false,"products":[],"priority":{"label":"Assess exposure and vendor guidance","reasons":["No higher-priority signal is available in the current stored evidence."]},"epss":{"probability":0.0019,"percentile":0.08682,"date":"2026-10-28","stale":false},"version_assessment":null},"news":[],"campaigns":[],"domains":[{"domain":"bugzilla.suse.com","source_url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390","investigate_url":"https://investigate.aeglixmind.com/#bugzilla.suse.com"},{"domain":"github.com","source_url":"https://github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8","investigate_url":"https://investigate.aeglixmind.com/#github.com"}],"arsenal_url":"https://arsenal.aeglixmind.com/?cve=CVE-2025-23390","catalog_url":"https://cves.aeglixmind.com/cve/CVE-2025-23390","research_url":"https://investigate.aeglixmind.com/research/cve/CVE-2025-23390","coverage":{"news_candidates_checked":0,"campaign_candidates_checked":0,"bounded":false,"notice":"Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence."}}