Consul vulnerable to an authorization bypass in the agent's service mesh leaf certificate API

{
  "id": "d250fa7bc1d3307ead2c62b3bc2a44e9b620582e5a29ee831f76606d3d6ebda9",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-105765",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Consul vulnerable to an authorization bypass in the agent's service mesh leaf certificate API",
    "summary": "HashiCorp Consul and Consul Enterprise 1.17.0 up to 2.0.4 are vulnerable to an authorization bypass in the agent's service mesh leaf certificate API that may allow an attacker without a valid ACL token to retrieve a cached service leaf certificate and its private key. This vulnerability (CVE-2026-105765) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.",
    "evidence": "cve:CVE-2026-105765",
    "products": [
      {
        "name": {
          "value": "Consul",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Consul Enterprise",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-105765",
      "aliases": [
        "CVE-2026-105765"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "repo": "https://github.com/hashicorp/consul",
          "vendor": "HashiCorp",
          "product": "Consul",
          "versions": [
            {
              "status": "affected",
              "version": "1.17.0",
              "lessThan": "2.1.0",
              "versionType": "semver"
            }
          ],
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://github.com/hashicorp/consul",
          "vendor": "HashiCorp",
          "product": "Consul Enterprise",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "1.21.19",
                  "status": "unaffected"
                }
              ],
              "version": "1.17.0",
              "lessThan": "2.1.0",
              "versionType": "semver"
            }
          ],
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T18:12:14.351Z",
      "provider": "cve",
      "references": [
        "https://discuss.hashicorp.com/t/hcsec-2026-46-consul-vulnerable-to-an-authorization-bypass-in-the-agents-service-mesh-leaf-certificate-api/77911"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
          "shortName": "HashiCorp",
          "dateUpdated": "2026-10-26T18:12:14.351Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105765",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 330824,
  "published_at": "2026-10-26T17:42:36.012+00:00"
}