{
  "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
  }
}