Consul vulnerable to an authorization bypass in the catalog deregistration path

{
  "id": "84fda393e528920fbb37419a49beb425f57a1a4951661cfc101f8e086097e3f2",
  "url": "https://osv.dev/vulnerability/CVE-2026-87107",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Consul vulnerable to an authorization bypass in the catalog deregistration path",
    "summary": "Consul and Consul Enterprise are vulnerable to an authorization bypass in the catalog deregistration path that may allow a local ACL token to delete peer-imported catalog objects. A caller with {{service:write}} or {{node:write}} permission may exploit this issue to remove services, checks, or nodes imported from a peered cluster without holding authority over the peer origin. This vulnerability (CVE-2026-87107) is fixed in Consul 2.0.4 and Consul Enterprise 1.21.18, 1.22.12 and 2.0.4.",
    "evidence": "osv:CVE-2026-87107",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-87107",
      "aliases": [
        "BIT-consul-2026-87107",
        "CVE-2026-87107"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hashicorp/consul",
              "type": "GIT",
              "events": [
                {
                  "introduced": "4e96098f98228a6b91691abefced6493128d57ea"
                },
                {
                  "fixed": "a3eb721c21d4c1ff4baabf84da60158f374f8907"
                },
                {
                  "fixed": "bd0c5448a527f825308a97df4cd6615dda5d211c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1.21.0"
                      },
                      {
                        "fixed": "2.0.4"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "introduced": "1.21.0"
                      },
                      {
                        "fixed": "1.21.18"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "ChangesAt"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-87107.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.658479803Z",
      "provider": "osv",
      "references": [
        "https://discuss.hashicorp.com/t/hcsec-2026-36-consul-vulnerable-to-an-authorization-bypass-in-the-catalog-deregistration-path/77738",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87107.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-87107",
        "https://github.com/hashicorp/consul"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "HashiCorp",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/87xxx/CVE-2026-87107.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-87107",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 494365,
  "published_at": "2026-09-10T18:57:35.812+00:00"
}