Security advisory

{
  "id": "d76d0d91c4f788292a0e9f67cff2f56253a2e091a798b023ba4f02beb59c7ccb",
  "url": "https://osv.dev/vulnerability/CVE-2019-9764",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2019-9764",
    "summary": "HashiCorp Consul 1.4.3 lacks server hostname verification for agent-to-agent TLS communication. In other words, the product behaves as if verify_server_hostname were set to false, even when it is actually set to true. This is fixed in 1.4.4.",
    "evidence": "osv:CVE-2019-9764",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2019-9764",
      "aliases": [
        "CVE-2019-9764",
        "GHSA-q7fx-wm2p-qfj8",
        "GO-2023-1853"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hashicorp/consul",
              "type": "GIT",
              "events": [
                {
                  "introduced": "567e41ff6b096a478333c804d5c18264050bc3f8"
                },
                {
                  "last_affected": "567e41ff6b096a478333c804d5c18264050bc3f8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:hashicorp:consul:1.4.3:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.4.3"
                      },
                      {
                        "last_affected": "1.4.3"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.4.3",
            "v1.4.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-9764.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:46.271425089Z",
      "provider": "osv",
      "references": [
        "https://github.com/hashicorp/consul/issues/5519"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2019-9764",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383807,
  "published_at": "2019-03-26T14:29:00.507+00:00"
}