{"id":"CVE-2019-9764","aliases":["GHSA-q7fx-wm2p-qfj8","GO-2023-1853"],"url":"https://o3.security/vulnerability/CVE-2019-9764","summary":"HashiCorp Consul vulnerable to Origin Validation Error","details":"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.","published":"2019-03-26T14:29:00.507Z","modified":"2026-10-20T10:52:46.271425089Z","cvss":{"score":7.4,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"},"epss":{"score":0.00605,"percentile":0.4742,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"Go","name":"github.com/hashicorp/consul","fixedVersion":"1.4.4"}],"fix":{"url":"https://github.com/hashicorp/consul/commit/7e11dd82aa8dae505b7307adcb68c9d3194b3b40","label":"hashicorp/consul@7e11dd8"},"references":[{"type":"EVIDENCE","url":"https://github.com/hashicorp/consul/issues/5519"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-9764"},{"type":"WEB","url":"https://github.com/hashicorp/consul/commit/7e11dd82aa8dae505b7307adcb68c9d3194b3b40"},{"type":"PACKAGE","url":"https://github.com/hashicorp/consul"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-20T10:52:46.271425089Z"}}