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CVE-2026-49762

Estado: AplazadaMedia (5.1)—

Uncontrolled Resource Consumption vulnerability in the Elixir standard library's Version module allows an attacker who controls a version string to cause a denial of service through CPU and memory exhaustion.

The version parser converts numeric version components (major, minor, patch and numeric pre-release/build identifiers) to integers without bounding their length. A single large all-digit component therefore forces a super-linear, non-yielding base-10 to arbitrary-precision integer conversion (String.to_integer/1, i.e. :erlang.binary_to_integer/1) that pins a BEAM scheduler, and a larger component raises an uncaught SystemLimitError that crashes the calling process. A single moderately sized string (around one megabyte) is enough; no authentication is required.

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This is reachable from the public entry points Version.parse/1, Version.parse!/1, Version.match?/3, Version.compare/2, and Version.parse_requirement/1, which applications routinely call on untrusted input such as HTTP parameters, dependency-manifest fields, and package metadata.

This vulnerability is associated with program files lib/version.ex and program routines 'Elixir.Version.Parser':parse_digits/2.

This issue affects elixir: from 0.9.3 before 1.20.1.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Ematia — ElixirAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-49762",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-49762",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-06-09T14:48:56.343391Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 5.1,
          "Automatable": "NOT_DEFINED",
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:L/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",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "LOW",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "subConfidentialityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "confidentialityRequirement": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
        }
      }
    ]
  },
  "affected": [
    {
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/elixir-lang/elixir",
          "vendor": "elixir-lang",
          "modules": [
            "'Elixir.Version'",
            "'Elixir.Version.Parser'"
          ],
          "product": "elixir",
          "versions": [
            {
              "status": "affected",
              "version": "0.9.3",
              "lessThan": "1.20.1",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:otp/elixir?repository_url=https:%2F%2Fgithub.com%2Felixir-lang%2Felixir&vcs_url=git%2Bhttps:%2F%2Fgithub.com%2Felixir-lang%2Felixir.git",
          "packageName": "elixir",
          "programFiles": [
            "lib/version.ex"
          ],
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Version':parse/1"
            },
            {
              "name": "'Elixir.Version':parse!/1"
            },
            {
              "name": "'Elixir.Version':match?/3"
            },
            {
              "name": "'Elixir.Version':compare/2"
            },
            {
              "name": "'Elixir.Version':parse_requirement/1"
            },
            {
              "name": "'Elixir.Version.Parser':parse_version/2"
            },
            {
              "name": "'Elixir.Version.Parser':parse_digits/2"
            },
            {
              "name": "'Elixir.Version.Parser':require_digits/1"
            },
            {
              "name": "'Elixir.Version.Parser':convert_parts_to_integer/2"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/elixir-lang/elixir",
          "vendor": "elixir-lang",
          "modules": [
            "'Elixir.Version'",
            "'Elixir.Version.Parser'"
          ],
          "product": "elixir",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "c64417d72fd5c7d09e963ca3ac5fa2b140978d9e",
                  "status": "unaffected"
                },
                {
                  "at": "64e6707233464c3e55a9ca6b44019aed25b0390a",
                  "status": "unaffected"
                }
              ],
              "version": "057691722eb8cfe315f5606358954a2b173ff7a3",
              "lessThan": "*",
              "versionType": "git"
            }
          ],
          "packageURL": "pkg:github/elixir-lang/elixir",
          "packageName": "elixir-lang/elixir",
          "programFiles": [
            "lib/elixir/lib/version.ex"
          ],
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Version':parse/1"
            },
            {
              "name": "'Elixir.Version':parse!/1"
            },
            {
              "name": "'Elixir.Version':match?/3"
            },
            {
              "name": "'Elixir.Version':compare/2"
            },
            {
              "name": "'Elixir.Version':parse_requirement/1"
            },
            {
              "name": "'Elixir.Version.Parser':parse_version/2"
            },
            {
              "name": "'Elixir.Version.Parser':parse_digits/2"
            },
            {
              "name": "'Elixir.Version.Parser':require_digits/1"
            },
            {
              "name": "'Elixir.Version.Parser':convert_parts_to_integer/2"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-06-09T14:16:44.317",
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-49762.html",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/commit/057691722eb8cfe315f5606358954a2b173ff7a3",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/commit/64e6707233464c3e55a9ca6b44019aed25b0390a",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/commit/c64417d72fd5c7d09e963ca3ac5fa2b140978d9e",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/elixir-lang/elixir/security/advisories/GHSA-w2h8-8x3g-278p",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-49762",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Uncontrolled Resource Consumption vulnerability in the Elixir standard library's Version module allows an attacker who controls a version string to cause a denial of service through CPU and memory exhaustion.\n\nThe version parser converts numeric version components (major, minor, patch and numeric pre-release/build identifiers) to integers without bounding their length. A single large all-digit component therefore forces a super-linear, non-yielding base-10 to arbitrary-precision integer conversion (String.to_integer/1, i.e. :erlang.binary_to_integer/1) that pins a BEAM scheduler, and a larger component raises an uncaught SystemLimitError that crashes the calling process. A single moderately sized string (around one megabyte) is enough; no authentication is required.\n\nThis is reachable from the public entry points Version.parse/1, Version.parse!/1, Version.match?/3, Version.compare/2, and Version.parse_requirement/1, which applications routinely call on untrusted input such as HTTP parameters, dependency-manifest fields, and package metadata.\n\nThis vulnerability is associated with program files lib/version.ex and program routines 'Elixir.Version.Parser':parse_digits/2.\n\nThis issue affects elixir: from 0.9.3 before 1.20.1."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de Consumo de Recursos No Controlado en el módulo Version de la biblioteca estándar de Elixir permite a un atacante que controla una cadena de versión causar una denegación de servicio a través del agotamiento de CPU y memoria.\n\nEl analizador de versiones convierte componentes numéricos de versión (mayor, menor, parche e identificadores numéricos de pre-lanzamiento/construcción) a enteros sin limitar su longitud. Un único componente grande de solo dígitos, por lo tanto, fuerza una conversión superlineal, no productiva, de base-10 a entero de precisión arbitraria (String.to_integer/1, es decir, :erlang.binary_to_integer/1) que fija un planificador BEAM, y un componente más grande genera un SystemLimitError no capturado que bloquea el proceso de llamada. Una única cadena de tamaño moderado (alrededor de un megabyte) es suficiente; no se requiere autenticación.\n\nEsto es accesible desde los puntos de entrada públicos Version.parse/1, Version.parse!/1, Version.match?/3, Version.compare/2, y Version.parse_requirement/1, que las aplicaciones llaman rutinariamente en entradas no confiables como parámetros HTTP, campos de manifiesto de dependencia y metadatos de paquete.\n\nEsta vulnerabilidad está asociada con los archivos de programa lib/version.ex y las rutinas de programa 'Elixir.Version.Parser':parse_digits/2.\n\nEste problema afecta a Elixir: desde 1.5.0 antes de 1.20.1."
    }
  ],
  "lastModified": "2026-10-06T09:17:56.080",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}