{"id":"CVE-2018-19653","aliases":["GHSA-4qvx-qq5w-695p","GO-2023-1850"],"title":"HashiCorp Consul can use cleartext agent-to-agent RPC communication","summary":"HashiCorp Consul can use cleartext agent-to-agent RPC communication","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","vendor":"hashicorp","product":"github.com/hashicorp/consul","ecosystem":"go","affected":["github.com/hashicorp/consul >= 0.5.1, < 1.4.1"],"patched":["github.com/hashicorp/consul 1.4.1"],"published":"2022-05-14","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:49:37.495348649Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-4qvx-qq5w-695p","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-19653"},{"url":"https://github.com/hashicorp/consul/pull/5069"},{"url":"https://github.com/hashicorp/consul/commit/b64e8b262f80397eab4f39c6ae7e14683cb9f55c"},{"url":"https://github.com/hashicorp/consul"},{"url":"https://groups.google.com/forum/#!topic/consul-tool/7TCw06oio0I"}],"tags":["osv","go"],"epss":0.01165,"epssPercentile":0.65448,"ingestedAt":"2026-09-12T03:13:01.753Z","slug":"CVE-2018-19653","body":"## Overview\n\nHashiCorp Consul 0.5.1 through 1.4.0 can use cleartext agent-to-agent RPC communication because the `verify_outgoing` setting is improperly documented. NOTE: the vendor has provided reconfiguration steps that do not require a software upgrade.\n\n## Affected packages\n\n- `github.com/hashicorp/consul >= 0.5.1, < 1.4.1`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/hashicorp/consul 1.4.1`","depth":"sunlit","depthScore":33,"depthScoreParts":{"impact":32.5,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}