Consul vulnerable to an authorization bypass in service mesh registration

{
  "id": "2b087f1b628d54192e5e6af0ccc3f43f00674fa692bc2d54a86226b2f8e95d75",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-105608",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Consul vulnerable to an authorization bypass in service mesh registration",
    "summary": "HashiCorp Consul and Consul Enterprise are vulnerable to an authorization bypass in service mesh proxy registration. This may allow a user with service write permission to apply Envoy escape-hatch configuration without the required mesh write permission. This vulnerability (CVE-2026-105608) is fixed in Consul Community Edition 2.1.0 and Consul Enterprise 2.1.0 and 1.21.19.",
    "evidence": "cve:CVE-2026-105608",
    "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-2026-105608",
      "aliases": [
        "CVE-2026-105608"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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      "affected": [
        {
          "repo": "https://github.com/hashicorp/consul",
          "vendor": "HashiCorp",
          "product": "Consul",
          "versions": [
            {
              "status": "affected",
              "version": "2.0.4",
              "lessThan": "2.1.0",
              "versionType": "semver"
            }
          ],
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
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          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://github.com/hashicorp/consul",
          "vendor": "HashiCorp",
          "product": "Consul Enterprise",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "1.21.18",
                  "status": "affected"
                },
                {
                  "at": "1.21.19",
                  "status": "unaffected"
                },
                {
                  "at": "1.22.12",
                  "status": "affected"
                }
              ],
              "version": "2.0.4",
              "lessThan": "2.1.0",
              "versionType": "semver"
            }
          ],
          "platforms": [
            "64 bit",
            "32 bit",
            "x86",
            "ARM",
            "MacOS",
            "Windows",
            "Linux"
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T19:38:29.607Z",
      "provider": "cve",
      "references": [
        "https://discuss.hashicorp.com/t/hcsec-2026-47-consul-vulnerable-to-an-authorization-bypass-in-service-mesh-registration/77912"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-105608",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T19:05:41.796579Z"
                  }
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            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-26T19:38:29.607Z"
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        ],
        "cna": {
          "orgId": "67fedba0-ff2e-4543-ba5b-aa93e87718cc",
          "shortName": "HashiCorp",
          "dateUpdated": "2026-10-26T17:53:16.484Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105608",
        "evidence": "/cveMetadata/cveId"
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    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 338259,
  "published_at": "2026-10-26T17:52:33.021+00:00"
}