CVE-2026-50166: Github.com/kumahq/kuma/v2 Kumactl Connects To Control Plane Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-v95x-xhq5-4929",
  "modified" : "2026-07-16T19:12:08Z",
  "published" : "2026-07-16T19:12:08Z",
  "aliases" : [ "CVE-2026-50166" ],
  "summary" : "kumactl connects to control plane without verifying TLS certificate when no CA is configured",
  "details" : "When an operator adds an HTTPS control plane profile to `kumactl` without providing a CA certificate, `kumactl` disables TLS verification and sends API tokens over the unverified connection\n\n## Impact\n\nAn attacker on the network path between the operator and the control plane can intercept user or admin API tokens and then act against the control plane as that user\n\n## Affected configurations\n\n- `kumactl` profiles manually added against an HTTPS control plane endpoint without `--ca-cert-file`\n\n## Not affected\n\n- The default local profile, which uses plain HTTP\n\n## Workarounds\n\nWhen adding an HTTPS control plane profile to `kumactl`, always pass `--ca-cert-file` pointing at the control plane's serving CA. Alternatively, terminate the control plane behind a publicly trusted certificate; the patched releases will verify successfully against the operating system trust store with no further configuration\n\n## Resources\n\n- Fix: https://github.com/kumahq/kuma/pull/16777",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kumahq/kuma/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.7.26"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kumahq/kuma/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.8.0"
      }, {
        "fixed" : "2.9.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kumahq/kuma/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.10.0"
      }, {
        "fixed" : "2.11.14"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kumahq/kuma/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.12.0"
      }, {
        "fixed" : "2.12.11"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kumahq/kuma/v2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.13.0"
      }, {
        "fixed" : "2.13.7"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kumahq/kuma"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.8.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/kumahq/kuma/security/advisories/GHSA-v95x-xhq5-4929"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kumahq/kuma/pull/16777"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kumahq/kuma/commit/2ecadac1aa2fd8cded4c2ab768949f4c2ec83e2a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kumahq/kuma"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-07-16T19:12:08Z",
    "nvd_published_at" : null
  }
}