CVE-2026-52724: Github.com/kumahq/kuma/v2 Kuma-dp Connects To Control Plane Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-wvmp-6r4v-j6cv",
  "modified" : "2026-07-16T20:09:12Z",
  "published" : "2026-07-16T20:09:12Z",
  "aliases" : [ "CVE-2026-52724" ],
  "summary" : "kuma-dp connects to control plane without verifying TLS certificate when no CA is configured",
  "details" : "When kuma-dp is started against an HTTPS control plane and the operator did not pass a CA certificate, the data plane connects with TLS peer verification disabled. The dataplane authentication token is sent over this unverified connection\n\n## Impact\n\nAn on-path attacker can intercept the dataplane authentication token and impersonate the control plane to the data plane, allowing them to inject a forged bootstrap configuration and take over the proxy\n\n## Affected configurations\n\n- Universal mode `kuma-dp` started against an HTTPS control plane without `--ca-cert-file` (or `KUMA_CONTROL_PLANE_CA_CERT` unset)\n\n## Not affected\n\n- Kubernetes installs done through the standard installers (`kumactl install control-plane` or the official Helm chart). In both cases the control plane's mutating admission webhook injects `KUMA_CONTROL_PLANE_CA_CERT` into every sidecar at pod admission, so each `kuma-dp` starts with the CA already configured\n\n## Workarounds\n\nSet `--ca-cert-file` (or `KUMA_CONTROL_PLANE_CA_CERT`) on every Universal mode data plane and point it 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:N/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-wvmp-6r4v-j6cv"
  }, {
    "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" : "2026-07-16T20:09:12Z",
    "nvd_published_at" : null
  }
}