Kong Mesh: the kuma-dp readiness service exposes the Envoy admin API without authentication

{
  "id": "92270f8b1b46f78b33e31fd5efca907db680e1af1711310f6aa0e7b2b3fda05a",
  "url": "https://osv.dev/vulnerability/CVE-2026-18673",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Kong Mesh: the kuma-dp readiness service exposes the Envoy admin API without authentication",
    "summary": "When kuma-dp is configured with the Envoy admin API on a Unix domain socket, which is the default, its readiness service on TCP port 9902 - bound to all interfaces - forwards almost the entire Envoy admin API to any caller that can reach the port, with no authentication. An attacker with network access to a data plane's port 9902, for example another pod on the cluster network, can read Envoy and data plane configuration without credentials: config dumps, cluster and listener lists, stats, and the mesh trust bundle. Exposure is read-only - destructive Envoy admin actions are blocked and private keys are not exposed.",
    "evidence": "osv:CVE-2026-18673",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-18673",
      "aliases": [
        "CVE-2026-18673",
        "GHSA-r9pv-x3pm-4r2w"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/kumahq/kuma",
              "type": "GIT",
              "events": [
                {
                  "introduced": "51c6d3819be75d9587942242cdec709bc9934321"
                },
                {
                  "fixed": "a82706b54052df26826f33a8421145572689e6b5"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.14.0"
                      },
                      {
                        "fixed": "2.14.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.14.1",
            "v2.14.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18673.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:41.135763952Z",
      "provider": "osv",
      "references": [
        "https://developer.konghq.com/mesh/changelog/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18673.json",
        "https://github.com/kumahq/kuma/security/advisories/GHSA-r9pv-x3pm-4r2w",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-18673",
        "https://github.com/kumahq/kuma/pull/17317",
        "https://github.com/kumahq/kuma/pull/17418"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-200",
          "CWE-306"
        ],
        "cna_assigner": "Kong",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18673.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-18673",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 509092,
  "published_at": "2026-08-12T18:20:33.205+00:00"
}