{
  "affected": [
    {
      "ranges": [
        {
          "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"
          },
          "events": [
            {
              "introduced": "0d26f206b3c521fdb78218285ffb69a91c6e5c81"
            },
            {
              "fixed": "1dd9dd2074db8f1f9478b9b2fb046eba0a2539e4"
            },
            {
              "introduced": "3e91ed3fb600e6499107751f7c3c0ab255f09640"
            },
            {
              "fixed": "4809cf03c8926d834067bf1111ea24df6b875c32"
            },
            {
              "introduced": "3d1fa6c06ff392c9fa66ca2f46831e2dae23bc16"
            },
            {
              "fixed": "fcb09948fb937f043ab421b2b7ef03d7cbcce02b"
            }
          ],
          "repo": "https://github.com/rancher/fleet",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xgpc-q899-67p8"
  ],
  "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"
  },
  "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.",
  "id": "CVE-2025-23390",
  "modified": "2026-10-17T02:30:32.783047677Z",
  "published": "2026-10-15T08:16:46.096Z",
  "references": [
    {
      "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"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.suse.com/show_bug.cgi?id=CVE-2025-23390"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Fleet doesn’t validate a server’s certificate when connecting through SSH"
}