{"schemaVersion":3,"id":"CVE-2025-23390","aliases":["GHSA-xgpc-q899-67p8","GO-2025-3649"],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2026-10-15T08:16:46.096Z","modified":"2026-10-15T14:21:33.655Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"OSV · Go","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","exploitability":7.2,"impact":5.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","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","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.0019,"percentile":0.0813,"severity":"low","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-15T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0019,"percentile":0.0813}],"last30":[{"date":"2026-10-15T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.0019,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.0019,"percentile":0.0813}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-295","name":"Improper Certificate Validation","description":"The product does not validate, or incorrectly validates, a certificate.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/295.html"}],"affected":[{"vendor":"github.com/rancher","product":"fleet","name":"github.com/rancher/fleet","label":"fleet","ecosystem":"Go","cpePart":null,"purl":"pkg:golang/github.com/rancher/fleet","purlType":"golang","versions":[{"text":"≥ 0.9.0-rc.1, < 0.10.12","noFixRecorded":false,"fixedIn":null},{"text":"≥ 0.11.0, < 0.11.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 0.12.0, < 0.12.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.9.0-rc.1, < 0.10.12 | ≥ 0.11.0, < 0.11.7 | ≥ 0.12.0, < 0.12.2","eol":null,"hubHref":null},{"vendor":"suse","product":"fleet","name":"fleet","label":"fleet","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 0.9.0-rc.1, < 0.10.12","noFixRecorded":false,"fixedIn":null},{"text":"≥ 0.11.0, < 0.11.7","noFixRecorded":false,"fixedIn":null},{"text":"≥ 0.12.0, < 0.12.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.9.0-rc.1, < 0.10.12 | ≥ 0.11.0, < 0.11.7 | ≥ 0.12.0, < 0.12.2","eol":null,"hubHref":"/vendor/suse/fleet"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8","label":"github.com/rancher/fleet/security/advisories/GHSA-xgpc-q899-67p8","hostname":"github.com","tags":["WEB","Advisory"]},{"url":"https://github.com/rancher/fleet/pull/3571","label":"github.com/rancher/fleet/pull/3571","hostname":"github.com","tags":["WEB","FIX"]},{"url":"https://github.com/rancher/fleet/pull/3572","label":"github.com/rancher/fleet/pull/3572","hostname":"github.com","tags":["WEB","FIX"]},{"url":"https://github.com/rancher/fleet/pull/3573","label":"github.com/rancher/fleet/pull/3573","hostname":"github.com","tags":["WEB","FIX"]},{"url":"https://github.com/rancher/fleet","label":"github.com/rancher/fleet","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/rancher/fleet/releases/tag/v0.10.12","label":"github.com/rancher/fleet/releases/tag/v0.10.12","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/rancher/fleet/releases/tag/v0.11.7","label":"github.com/rancher/fleet/releases/tag/v0.11.7","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/rancher/fleet/releases/tag/v0.12.2","label":"github.com/rancher/fleet/releases/tag/v0.12.2","hostname":"github.com","tags":["WEB"]},{"url":"https://pkg.go.dev/vuln/GO-2025-3649","label":"pkg.go.dev/vuln/GO-2025-3649","hostname":"pkg.go.dev","tags":["WEB"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390","label":"bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390","hostname":"bugzilla.suse.com","tags":[]}],"lineage":{"upstream":[],"downstream":["OPENSUSE-SU-2025:15059-1"],"duplicates":[],"related":["OPENSUSE-SU-2025:15059-1"]},"timeline":[{"kind":"published","date":"2026-10-15T08:16:46.096Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-15T14:21:33.655Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":25,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T08:24:07.676Z","stale":false,"partial":false}}