CVE-2026-52879

{
  "id": "CVE-2026-52879",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-07T23:17:04.743",
  "lastModified": "2026-10-24T16:10:00.153",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Klever-Go is the Go implementation of the Klever blockchain protocol. In versions 1.7.14 through 1.7.17, the direct-message ingress handler spawns a new goroutine for every incoming direct message before the processor-level antiflood layer makes any admission decision, with no semaphore, throttler, or bound on the number of concurrent in-flight spawns. Because the antiflood check runs inside the spawned goroutine rather than before it, a single connected peer can open a direct-send stream and send a stream of well-formed messages to force unbounded goroutine creation, where each goroutine allocates its own stack and holds a message reference until processing completes, adding scheduler and garbage-collection pressure faster than the runtime can drain it. This lets one peer degrade the node's availability and its ability to process legitimate traffic, resulting in a remotely triggerable denial of service. The issue is fixed in 1.7.18."
    },
    {
      "lang": "es",
      "value": "Klever-Go es la implementación en Go del protocolo blockchain de Klever. En las versiones 1.7.14 a la 1.7.17, el gestor de entrada de mensajes directos crea una nueva goroutine para cada mensaje directo entrante antes de que la capa antiflood a nivel de procesador tome cualquier decisión de admisión, sin semáforo, limitador o límite en el número de creaciones concurrentes en curso. Debido a que la verificación antiflood se ejecuta dentro de la goroutine creada en lugar de antes de ella, un único par conectado puede abrir un flujo de envío directo y enviar un flujo de mensajes bien formados para forzar la creación ilimitada de goroutines, donde cada goroutine asigna su propia pila y mantiene una referencia al mensaje hasta que el procesamiento se completa, añadiendo presión al planificador y a la recolección de basura más rápido de lo que el tiempo de ejecución puede drenarla. Esto permite que un par degrade la disponibilidad del nodo y su capacidad para procesar tráfico legítimo, resultando en una denegación de servicio que puede ser activada remotamente. El problema está solucionado en la 1.7.18."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "klever-io",
          "product": "klever-go",
          "versions": [
            {
              "version": ">= 1.7.14, < 1.7.18",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-10T13:35:42.857307Z",
          "id": "CVE-2026-52879",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/klever-io/klever-go/releases/tag/v1.7.18",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/klever-io/klever-go/security/advisories/GHSA-hf2g-6j7h-98wg",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/klever-io/klever-go/security/advisories/GHSA-hf2g-6j7h-98wg",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}