{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "3.0.0"
              },
              {
                "fixed": "3.6.3"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "8df2f8e7b9c7bb9390ac74bb7bace27edca81a2b"
            },
            {
              "fixed": "22098d41c6620ce07cf8a0134d37302355e1e5ef"
            }
          ],
          "repo": "https://github.com/mbed-tls/mbedtls",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-1188"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27809.json"
  },
  "details": "Mbed TLS before 2.28.10 and 3.x before 3.6.3, on the client side, accepts servers that have trusted certificates for arbitrary hostnames unless the TLS client application calls mbedtls_ssl_set_hostname.",
  "id": "CVE-2025-27809",
  "modified": "2026-08-27T03:30:56.893225443Z",
  "published": "2025-03-25T00:00:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://mastodon.social/@bagder/114219540623402700"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27809.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2025-03-1/"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27809"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/Mbed-TLS/mbedtls/issues/466"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Mbed-TLS/mbedtls/releases"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}