{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.7.25"
              },
              {
                "introduced": "2.9.0"
              },
              {
                "fixed": "2.9.15"
              },
              {
                "introduced": "2.11.0"
              },
              {
                "fixed": "2.11.13"
              },
              {
                "introduced": "2.12.0"
              },
              {
                "fixed": "2.12.10"
              },
              {
                "introduced": "2.13.0"
              },
              {
                "fixed": "2.13.5"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "introduced": "948e6a4391632607148f4dcdf7e9adce422a8075"
            },
            {
              "introduced": "77a25d52f5a6d1fd6df6e6d5ffa9ab8e3ce8456e"
            },
            {
              "introduced": "6b4779917a9f9f9a73ef959a22e243b9a14b4ba1"
            },
            {
              "introduced": "99bb946e09bcdf7f7e6c1275c8bf14206db77274"
            },
            {
              "fixed": "316b38f74fa56afa8017a5b9348d97128354d1a6"
            },
            {
              "fixed": "2fb87410c631ab1597802ca694c64bb5378316d7"
            },
            {
              "fixed": "5d3be278f7c9657586411b82ce10ea26f1278f4a"
            },
            {
              "fixed": "44f11393a9f2bd10c62265bab924c206f3e138d8"
            },
            {
              "fixed": "6fbb2b7181215751100d09ca4706a2fe2b58e174"
            },
            {
              "fixed": "8fefa8595d44eb68d922405702ed7a0826322907"
            }
          ],
          "repo": "https://github.com/kumahq/kuma",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3vcp-chfh-f6r2"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-346",
      "CWE-942"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45021.json"
  },
  "details": "Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5, the default kuma-cp config leaks the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. CorsAllowedDomains: [\".*\"] reflects any Origin, and LocalhostIsAdmin: true promotes requests from 127.0.0.1 to mesh-system:admin. A cross-origin fetch() from a malicious page returns the admin JWT and signing material. This vulnerability is fixed in 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5.",
  "id": "CVE-2026-45021",
  "modified": "2026-07-08T05:38:45.657065480Z",
  "published": "2026-05-28T17:45:14.434Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45021.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-2026-45021"
    },
    {
      "type": "FIX",
      "url": "https://github.com/kumahq/kuma/commit/8fefa8595d44eb68d922405702ed7a0826322907"
    },
    {
      "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": "1.7.5",
  "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": "Kuma: Default kuma-cp leaks admin token cross-origin via CORS wildcard + LocalhostIsAdmin"
}