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CVE-2026-48593

Estado: AplazadaMedia (5.9)—

Uncontrolled Resource Consumption vulnerability in oban-bg oban_web ('Elixir.Oban.Web.CronExpr' modules) allows memory exhaustion via unbounded cron range expansion.

An attacker with access to schedule cron jobs can submit a malicious cron expression such as "0 0 1-100000000 * *". When a user with dashboard access views the cron job list, 'Elixir.Oban.Web.CronExpr':describe/1 is called to render the expression. parse_range/1 parses both range endpoints via Integer.parse/1 with no bounds check, and the downstream helpers expand_dom_parts/1 and expand_dow_parts/1 materialise the range eagerly via Enum.to_list/1, causing allocation of ~2.4 GB and stalling or crashing the BEAM node. A sibling helper extract_dom_values already validates range bounds, but the expansion helpers do not.

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This issue affects oban_web: from 2.12.0 before 2.12.5.

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.

Oban — Oban WEBAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-48593",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-48593",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-26T20:46:18.908875Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 5.9,
          "Automatable": "NOT_DEFINED",
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/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",
          "exploitMaturity": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED",
          "userInteraction": "PASSIVE",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "privilegesRequired": "LOW",
          "subIntegrityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "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:oban_web_project:oban_web:*:*:*:*:*:*:*:*"
          ],
          "vendor": "oban-bg",
          "modules": [
            "'Elixir.Oban.Web.CronExpr'"
          ],
          "product": "oban_web",
          "versions": [
            {
              "status": "affected",
              "version": "2.12.0",
              "lessThan": "2.12.5",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:hex/oban_web",
          "packageName": "oban_web",
          "programFiles": [
            "lib/oban/web/cron_expr.ex"
          ],
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Oban.Web.CronExpr':describe/1"
            },
            {
              "name": "'Elixir.Oban.Web.CronExpr':parse_range/1"
            },
            {
              "name": "'Elixir.Oban.Web.CronExpr':expand_dom_parts/1"
            },
            {
              "name": "'Elixir.Oban.Web.CronExpr':expand_dow_parts/1"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:oban_web_project:oban_web:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/oban-bg/oban_web.git",
          "vendor": "oban-bg",
          "modules": [
            "'Elixir.Oban.Web.CronExpr'"
          ],
          "product": "oban_web",
          "versions": [
            {
              "status": "affected",
              "version": "a97c7960bb389b05aaab4cf8042985f02ceddc24",
              "lessThan": "9998b7e284e02fdd4645dd6231760038e63b584d",
              "versionType": "git"
            }
          ],
          "packageURL": "pkg:github/oban-bg/oban_web",
          "packageName": "oban-bg/oban_web",
          "programFiles": [
            "lib/oban/web/cron_expr.ex"
          ],
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Oban.Web.CronExpr':describe/1"
            },
            {
              "name": "'Elixir.Oban.Web.CronExpr':parse_range/1"
            },
            {
              "name": "'Elixir.Oban.Web.CronExpr':expand_dom_parts/1"
            },
            {
              "name": "'Elixir.Oban.Web.CronExpr':expand_dow_parts/1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-26T21:16:41.857",
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-48593.html",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/oban-bg/oban_web/commit/9998b7e284e02fdd4645dd6231760038e63b584d",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/oban-bg/oban_web/security/advisories/GHSA-6xh2-93p9-vqh4",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48593",
      "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 oban-bg oban_web ('Elixir.Oban.Web.CronExpr' modules) allows memory exhaustion via unbounded cron range expansion.\n\nAn attacker with access to schedule cron jobs can submit a malicious cron expression such as \"0 0 1-100000000 * *\". When a user with dashboard access views the cron job list, 'Elixir.Oban.Web.CronExpr':describe/1 is called to render the expression. parse_range/1 parses both range endpoints via Integer.parse/1 with no bounds check, and the downstream helpers expand_dom_parts/1 and expand_dow_parts/1 materialise the range eagerly via Enum.to_list/1, causing allocation of ~2.4 GB and stalling or crashing the BEAM node. A sibling helper extract_dom_values already validates range bounds, but the expansion helpers do not.\n\nThis issue affects oban_web: from 2.12.0 before 2.12.5."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de consumo de recursos no controlado en oban-bg oban_web (módulos 'Elixir.Oban.Web.CronExpr') permite el agotamiento de la memoria a través de la expansión ilimitada del rango cron.\n\nUn atacante con acceso para programar trabajos cron puede enviar una expresión cron maliciosa como '0 0 1-100000000 * *'. Cuando un usuario con acceso al panel de control ve la lista de trabajos cron, se llama a 'Elixir.Oban.Web.CronExpr':describe/1 para renderizar la expresión. parse_range/1 analiza ambos puntos finales del rango a través de Integer.parse/1 sin verificación de límites, y los ayudantes posteriores expand_dom_parts/1 y expand_dow_parts/1 materializan el rango de forma ávida a través de Enum.to_list/1, causando una asignación de ~2.4 GB y el estancamiento o caída del nodo BEAM. Un ayudante hermano extract_dom_values ya valida los límites del rango, pero los ayudantes de expansión no lo hacen.\n\nEste problema afecta a oban_web: desde 2.12.0 antes de 2.12.5."
    }
  ],
  "lastModified": "2026-07-24T11:10:00.170",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}