CVE-2026-18675

{
  "id": "CVE-2026-18675",
  "sourceIdentifier": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
  "published": "2026-08-12T19:17:30.650",
  "lastModified": "2026-10-23T19:10:00.167",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The dataplane token validator in kuma-cp performs an unchecked Go type assertion on the JWT kid header. A token whose kid is a JSON number decodes as a float64 and triggers a runtime panic before any signature, claims, or authorization check runs.\n\n\n\nThe panic terminates the entire kuma-cp process, HTTP API, the health and readiness endpoints, and xDS. Unauthenticated access to the dataplane gRPC server can trigger the crash with a malformed token\n\n\n\nA single request is a transient interruption; sustaining an outage requires repeated requests."
    },
    {
      "lang": "es",
      "value": "El validador de tokens del plano de datos en kuma-cp realiza una aserción de tipo Go sin verificar en el encabezado ’kid’ de JWT. Un token cuyo ’kid’ es un número JSON se decodifica como un float64 y desencadena un pánico en tiempo de ejecución antes de que se ejecute cualquier verificación de firma, reclamaciones o autorización.\n\nEl pánico termina todo el proceso de kuma-cp, la API HTTP, los puntos finales de salud y disponibilidad, y xDS. El acceso no autenticado al servidor gRPC del plano de datos puede desencadenar el fallo con un token malformado.\n\nUna única solicitud es una interrupción transitoria; mantener una interrupción del servicio requiere solicitudes repetidas."
    }
  ],
  "affected": [
    {
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "affectedData": [
        {
          "vendor": "Kong Inc.",
          "product": "Kong Mesh",
          "defaultStatus": "unaffected",
          "modules": [
            "kuma-cp"
          ],
          "platforms": [
            "Linux"
          ],
          "versions": [
            {
              "version": "0",
              "lessThan": "2.7.29",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.8.0",
              "lessThan": "2.9.19",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.10.0",
              "lessThan": "2.11.18",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.12.0",
              "lessThan": "2.12.14",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.13.0",
              "lessThan": "2.13.10",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "2.14.0",
              "lessThan": "2.14.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "ADJACENT",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "NOT_DEFINED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-13T15:28:24.304122Z",
          "id": "CVE-2026-18675",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-248"
        },
        {
          "lang": "en",
          "value": "CWE-704"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://developer.konghq.com/mesh/changelog/",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/pull/17465",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/pull/17467",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/pull/17468",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/pull/17469",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/pull/17470",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/pull/17471",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/pull/17472",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    },
    {
      "url": "https://github.com/kumahq/kuma/security/advisories/GHSA-5mxq-7xq4-3vx8",
      "source": "02762ae7-200e-4b20-9b2b-a77d5b8fc4cb"
    }
  ]
}