{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.7.25"
              },
              {
                "introduced": "2.8.0"
              },
              {
                "fixed": "2.9.15"
              },
              {
                "introduced": "2.10.0"
              },
              {
                "fixed": "2.11.13"
              },
              {
                "introduced": "2.12.0"
              },
              {
                "fixed": "2.12.10"
              },
              {
                "introduced": "2.13.0"
              },
              {
                "fixed": "2.13.5"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "316b38f74fa56afa8017a5b9348d97128354d1a6"
            },
            {
              "introduced": "1110a0305eec00f1b2fd7482d6df4f3dd6a9d78e"
            },
            {
              "fixed": "2fb87410c631ab1597802ca694c64bb5378316d7"
            },
            {
              "introduced": "fed2256136e694d2a5deedb2490d382ee280fbbe"
            },
            {
              "fixed": "5d3be278f7c9657586411b82ce10ea26f1278f4a"
            },
            {
              "introduced": "6b4779917a9f9f9a73ef959a22e243b9a14b4ba1"
            },
            {
              "fixed": "44f11393a9f2bd10c62265bab924c206f3e138d8"
            },
            {
              "introduced": "99bb946e09bcdf7f7e6c1275c8bf14206db77274"
            },
            {
              "fixed": "6fbb2b7181215751100d09ca4706a2fe2b58e174"
            }
          ],
          "repo": "https://github.com/kumahq/kuma",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3vcp-chfh-f6r2"
  ],
  "database_specific": {
    "cna_assigner": "Kong",
    "cwe_ids": [
      "CWE-346",
      "CWE-942"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18676.json"
  },
  "details": "The default kuma-cp configuration in Kong Mesh reveals the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. Due to a CORS misconfiguration a cross-origin fetch() from a malicious page returns the admin JWT and signing material.",
  "id": "CVE-2026-18676",
  "modified": "2026-08-15T11:31:23.223097204Z",
  "published": "2026-08-12T18:42:38.843Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://developer.konghq.com/mesh/changelog/"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18676.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18676"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kumahq/kuma/pull/16416"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kumahq/kuma/pull/16423"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kumahq/kuma/pull/16424"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kumahq/kuma/pull/16425"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kumahq/kuma/pull/16426"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kumahq/kuma/pull/16427"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Kong Mesh: default control plane config leaks the admin token cross-origin via a CORS wildcard and localhost admin"
}