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CVE-2026-3463

Estado: AnalizadaBaja (1.9)—

A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::binary_writer::append of the file source/detail/binary.hpp of the component Compound Document Parser. This manipulation causes heap-based buffer overflow. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. Patch name: 147. It is suggested to install a patch to address this issue.

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)

Xlnt-community — Xlnt

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-3463",
  "cveTags": [],
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          "options": [
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              "exploitation": "poc"
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              "automatable": "no"
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          "version": "2.0.3",
          "timestamp": "2026-03-03T14:47:46.086978Z"
        }
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          "authentication": "SINGLE",
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          "confidentialityImpact": "NONE"
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          "exploitMaturity": "PROOF_OF_CONCEPT",
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          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
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          "modules": [
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              "version": "1.6.1"
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  "published": "2026-03-03T12:16:06.880",
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      "url": "https://github.com/oneafter/0128/blob/main/xl2/repro",
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      "url": "https://github.com/xlnt-community/xlnt/issues/138#issuecomment-3868381672",
      "tags": [
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      "source": "cna@vuldb.com"
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    {
      "url": "https://github.com/xlnt-community/xlnt/pull/147",
      "tags": [
        "Issue Tracking"
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        "VDB Entry"
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      "source": "cna@vuldb.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A weakness has been identified in xlnt-community xlnt up to 1.6.1. Impacted is the function xlnt::detail::binary_writer::append of the file source/detail/binary.hpp of the component Compound Document Parser. This manipulation causes heap-based buffer overflow. The attack can only be executed locally. The exploit has been made available to the public and could be used for attacks. Patch name: 147. It is suggested to install a patch to address this issue."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una debilidad en xlnt-community xlnt hasta 1.6.1. La función xlnt::detail::binary_writer::append del archivo source/detail/binary.hpp del componente Analizador de Documentos Compuestos se ve afectada. Esta manipulación causa desbordamiento de búfer basado en montículo. El ataque solo puede ejecutarse localmente. El exploit se ha puesto a disposición del público y podría usarse para ataques. Nombre del parche: 147. Se sugiere instalar un parche para abordar este problema."
    }
  ],
  "lastModified": "2026-06-17T10:43:37.410",
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              "versionEndIncluding": "1.6.1"
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  "sourceIdentifier": "cna@vuldb.com"
}