Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path

{
  "id": "2ca8506ca1a2eb5076775cb014328fbd167de2f00bec5053a2708483fe151d5a",
  "url": "https://osv.dev/vulnerability/CVE-2026-19012",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Authenticated denial of service in Consul Enterprise-to-Community Edition downgrade path",
    "summary": "Consul Community Edition and Consul Enterprise 1.18.0 through 2.0.2 are vulnerable to an authenticated denial of service in the Enterprise-to-Community Edition downgrade path that may allow an authorized caller to crash the Consul server. A caller with config-entry write permission can submit a service-router configuration entry that causes the agent to exit unexpectedly. This vulnerability, CVE-2026-19012, is fixed in Consul 2.0.3 and Consul Enterprise 1.21.17, 1.22.11, and 2.0.3.",
    "evidence": "osv:CVE-2026-19012",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-19012",
      "aliases": [
        "BIT-consul-2026-19012",
        "CVE-2026-19012"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hashicorp/consul",
              "type": "GIT",
              "events": [
                {
                  "introduced": "349cec176db1a6067952c1708d384e56de4eb9e1"
                },
                {
                  "fixed": "d0f2be936dced184d8bddc6f9dd00295f7c34f74"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.18.0"
                      },
                      {
                        "fixed": "2.0.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-19012.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.216389612Z",
      "provider": "osv",
      "references": [
        "https://discuss.hashicorp.com/t/hcsec-2026-25-multiple-vulnerabilities-impacting-hashicorp-consul/77629",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19012.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-19012",
        "https://github.com/hashicorp/consul"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-476"
        ],
        "cna_assigner": "HashiCorp",
        "unresolved_ranges": [
          {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "1.18.0"
                  },
                  {
                    "fixed": "1.21.17"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "ChangesAt"
              }
            ]
          }
        ],
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/19xxx/CVE-2026-19012.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-19012",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496206,
  "published_at": "2026-08-07T19:18:59.119+00:00"
}