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CVE-2026-32686

Estado: AplazadaMedia (6.9)—

Uncontrolled Resource Consumption vulnerability in ericmj decimal allows unauthenticated remote Denial of Service.

The decimal library does not bound the exponent on parsed input. Storing a decimal with a very large exponent (e.g. Decimal.new("1e1000000000")) is accepted without error. Subsequent calls to arithmetic functions (Decimal.add/2, Decimal.sub/2, Decimal.div/2M), Decimal.to_string/2M with :normalM or :xsdM format, Decimal.to_integer/1M, Decimal.round/3M, or Decimal.compare/3M with a threshold allocate memory proportional to the exponent value, which can exhaust available memory and crash the BEAM VM.

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Any application that accepts user-supplied decimal input and subsequently performs arithmetic, rounding, conversion to integer, or string formatting on it is exposed. A single malicious request is sufficient to cause an out-of-memory crash.

This issue affects decimal: from 0.1.0 before 3.0.0.

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.

Ericmj — DecimalAI

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-32686",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-32686",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-08T22:42:13.343081Z"
        }
      }
    ],
    "cvssMetricV40": [
      {
        "type": "Secondary",
        "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
        "cvssData": {
          "Safety": "NOT_DEFINED",
          "version": "4.0",
          "Recovery": "NOT_DEFINED",
          "baseScore": 6.9,
          "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: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": "NONE",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "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:ericmj:decimal:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/ericmj/decimal",
          "vendor": "ericmj",
          "modules": [
            "'Elixir.Decimal'"
          ],
          "product": "decimal",
          "versions": [
            {
              "status": "affected",
              "version": "0.1.0",
              "lessThan": "3.0.0",
              "versionType": "semver"
            }
          ],
          "packageURL": "pkg:hex/decimal",
          "packageName": "decimal",
          "programFiles": [
            "lib/decimal.ex"
          ],
          "collectionURL": "https://repo.hex.pm",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Decimal':new/1"
            },
            {
              "name": "'Elixir.Decimal':parse/1"
            },
            {
              "name": "'Elixir.Decimal':cast/1"
            },
            {
              "name": "'Elixir.Decimal':add/2"
            },
            {
              "name": "'Elixir.Decimal':sub/2"
            },
            {
              "name": "'Elixir.Decimal':div/2"
            },
            {
              "name": "'Elixir.Decimal':to_string/2"
            },
            {
              "name": "'Elixir.Decimal':to_integer/1"
            },
            {
              "name": "'Elixir.Decimal':round/3"
            },
            {
              "name": "'Elixir.Decimal':compare/3"
            }
          ]
        },
        {
          "cpes": [
            "cpe:2.3:a:ericmj:decimal:*:*:*:*:*:*:*:*"
          ],
          "repo": "https://github.com/ericmj/decimal",
          "vendor": "ericmj",
          "modules": [
            "'Elixir.Decimal'"
          ],
          "product": "decimal",
          "versions": [
            {
              "status": "affected",
              "version": "bc11f4a2b6fb61fc1360a0ab4e79141bba918841",
              "lessThan": "6a523f3a73b8c9974540e21c7aa88f1258bb35ae",
              "versionType": "git"
            }
          ],
          "packageURL": "pkg:github/ericmj/decimal",
          "packageName": "ericmj/decimal",
          "programFiles": [
            "lib/decimal.ex"
          ],
          "collectionURL": "https://github.com",
          "defaultStatus": "unaffected",
          "programRoutines": [
            {
              "name": "'Elixir.Decimal':new/1"
            },
            {
              "name": "'Elixir.Decimal':parse/1"
            },
            {
              "name": "'Elixir.Decimal':cast/1"
            },
            {
              "name": "'Elixir.Decimal':add/2"
            },
            {
              "name": "'Elixir.Decimal':sub/2"
            },
            {
              "name": "'Elixir.Decimal':div/2"
            },
            {
              "name": "'Elixir.Decimal':to_string/2"
            },
            {
              "name": "'Elixir.Decimal':to_integer/1"
            },
            {
              "name": "'Elixir.Decimal':round/3"
            },
            {
              "name": "'Elixir.Decimal':compare/3"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-07T15:16:05.370",
  "references": [
    {
      "url": "https://cna.erlef.org/cves/CVE-2026-32686.html",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/ericmj/decimal/commit/6a523f3a73b8c9974540e21c7aa88f1258bb35ae",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/ericmj/decimal/commit/bc11f4a2b6fb61fc1360a0ab4e79141bba918841",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/ericmj/decimal/security/advisories/GHSA-rhv4-8758-jx7v",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://osv.dev/vulnerability/EEF-CVE-2026-32686",
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    },
    {
      "url": "https://github.com/ericmj/decimal/security/advisories/GHSA-rhv4-8758-jx7v",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "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 ericmj decimal allows unauthenticated remote Denial of Service.\n\nThe decimal library does not bound the exponent on parsed input. Storing a decimal with a very large exponent (e.g. Decimal.new(\"1e1000000000\")) is accepted without error. Subsequent calls to arithmetic functions (Decimal.add/2, Decimal.sub/2, Decimal.div/2M), Decimal.to_string/2M with :normalM or :xsdM format, Decimal.to_integer/1M, Decimal.round/3M, or Decimal.compare/3M with a threshold allocate memory proportional to the exponent value, which can exhaust available memory and crash the BEAM VM.\n\nAny application that accepts user-supplied decimal input and subsequently performs arithmetic, rounding, conversion to integer, or string formatting on it is exposed. A single malicious request is sufficient to cause an out-of-memory crash.\n\nThis issue affects decimal: from 0.1.0 before 3.0.0."
    }
  ],
  "lastModified": "2026-09-08T14:17:21.870",
  "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
}