Security advisory

{
  "id": "095ce9cecc75b8a051b1d25b651d5910e5e052fa84ad03eefb85407b5178bfe9",
  "url": "https://osv.dev/vulnerability/CVE-2019-11777",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-11777",
    "summary": "In the Eclipse Paho Java client library version 1.2.0, when connecting to an MQTT server using TLS and setting a host name verifier, the result of that verification is not checked. This could allow one MQTT server to impersonate another and provide the client library with incorrect information.",
    "evidence": "osv:CVE-2019-11777",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-11777",
      "aliases": [
        "CVE-2019-11777",
        "GHSA-63qc-p2x4-9fgf"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/eclipse-paho/paho.mqtt.java",
              "type": "GIT",
              "events": [
                {
                  "introduced": "e36f2ec59c260e97a9fb832d4e83faadd588ff4a"
                },
                {
                  "last_affected": "e36f2ec59c260e97a9fb832d4e83faadd588ff4a"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:eclipse:paho_java_client:1.2.0:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.2.0"
                      },
                      {
                        "last_affected": "1.2.0"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.2.0",
            "v1.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-11777.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:52.884947156Z",
      "provider": "osv",
      "references": [
        "https://bugs.eclipse.org/bugs/show_bug.cgi?id=549934"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-11777",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 437791,
  "published_at": "2019-09-11T18:15:10.757+00:00"
}