CVE-2026-48854

{
  "id": "CVE-2026-48854",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
  "published": "2026-06-15T23:16:45.813",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Allocation of Resources Without Limits or Throttling vulnerability in elixir-grpc grpc allows unauthenticated attackers to exhaust the BEAM's memory and crash the server by streaming a large or slow-trickle unary request body.\n\n'Elixir.GRPC.Server.Adapters.Cowboy.Handler':read_full_body/3 (lib/grpc/server/adapters/cowboy/handler.ex) accumulates every received chunk into a single growing binary with no size cap. Additionally, when the client omits the grpc-timeout header, the per-chunk read timeout resolves to :infinity, allowing a slow-trickle client to keep the connection alive indefinitely while memory grows. A single connection is sufficient to exhaust server memory and crash the node.\n\nThis issue affects grpc: from 0.3.0-alpha.2 before 1.0.0."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de asignación de recursos sin límites o estrangulamiento en elixir-grpc grpc permite a atacantes no autenticados agotar la memoria del BEAM y colapsar el servidor mediante la transmisión de un cuerpo de solicitud unaria grande o de goteo lento.\n\n’Elixir.GRPC.Server.Adapters.Cowboy.Handler’:read_full_body/3 (lib/grpc/server/adapters/cowboy/handler.ex) acumula cada fragmento recibido en un único binario creciente sin límite de tamaño. Además, cuando el cliente omite el encabezado grpc-timeout, el tiempo de espera de lectura por fragmento se resuelve a :infinity, permitiendo a un cliente de goteo lento mantener la conexión activa indefinidamente mientras la memoria crece. Una sola conexión es suficiente para agotar la memoria del servidor y colapsar el nodo.\n\nEste problema afecta a grpc desde 0.3.1 antes de 1.0.0."
    }
  ],
  "affected": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "affectedData": [
        {
          "vendor": "elixir-grpc",
          "product": "grpc",
          "defaultStatus": "unaffected",
          "collectionURL": "https://repo.hex.pm",
          "packageName": "grpc",
          "cpes": [
            "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "'Elixir.GRPC.Server.Adapters.Cowboy.Handler'"
          ],
          "programFiles": [
            "lib/grpc/server/adapters/cowboy/handler.ex"
          ],
          "programRoutines": [
            {
              "name": "'Elixir.GRPC.Server.Adapters.Cowboy.Handler':read_full_body/3"
            }
          ],
          "repo": "https://github.com/elixir-grpc/grpc",
          "packageURL": "pkg:hex/grpc",
          "versions": [
            {
              "version": "0.3.0-alpha.2",
              "lessThan": "1.0.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "elixir-grpc",
          "product": "grpc",
          "defaultStatus": "unaffected",
          "collectionURL": "https://github.com",
          "packageName": "elixir-grpc/grpc",
          "cpes": [
            "cpe:2.3:a:elixir-grpc:grpc:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "'Elixir.GRPC.Server.Adapters.Cowboy.Handler'"
          ],
          "programFiles": [
            "lib/grpc/server/adapters/cowboy/handler.ex"
          ],
          "programRoutines": [
            {
              "name": "'Elixir.GRPC.Server.Adapters.Cowboy.Handler':read_full_body/3"
            }
          ],
          "repo": "https://github.com/elixir-grpc/grpc",
          "packageURL": "pkg:github/elixir-grpc/grpc",
          "versions": [
            {
              "version": "d1abe70a6cad6dac4a3f8235d883d7c896989560",
              "lessThan": "49e18c3ec6bb9afe2f712caad3dbab5c56a68a00",
              "versionType": "git",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/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": 8.7,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "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": "2026-06-16T14:47:02.881535Z",
          "id": "CVE-2026-48854",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-48854.html",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-grpc/grpc/commit/49e18c3ec6bb9afe2f712caad3dbab5c56a68a00",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-grpc/grpc/commit/d1abe70a6cad6dac4a3f8235d883d7c896989560",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48854",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-grpc/grpc/security/advisories/GHSA-q8gf-9rvj-gmgj",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}