CVE-2026-59932

{
  "id": "CVE-2026-59932",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-28T19:17:39.590",
  "lastModified": "2026-10-23T23:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory and, when the file starts with gzip magic bytes, calls gzdecode() on the full compressed contents without enforcing a decompressed-size limit. A very small compressed .gnumeric file can expand to data larger than the PHP memory limit and crash the process during Gnumeric::canRead() before the file is rejected or fully parsed. This is reachable through normal file-type detection and Gnumeric loading paths, so applications that accept attacker-controlled spreadsheet uploads can suffer denial of service. This issue has been fixed in versions 5.8.1, 3.10.7, 2.4.7, 2.1.18 and 1.30.6."
    },
    {
      "lang": "es",
      "value": "PhpSpreadsheet es una biblioteca PHP pura para leer y escribir archivos de hoja de cálculo. En las versiones 4.0.0 a 5.8.0, 3.3.0 a 3.10.6, 2.2.0 a 2.4.6, 2.0.0 a 2.1.17, y todas las versiones hasta la 1.30.5 inclusive, el lector de Gnumeric lee archivos .gnumeric proporcionados por el atacante en la memoria y, cuando el archivo comienza con bytes mágicos de gzip, llama a gzdecode() sobre el contenido comprimido completo sin aplicar un límite de tamaño descomprimido. Un archivo .gnumeric comprimido muy pequeño puede expandirse a datos mayores que el límite de memoria de PHP y bloquear el proceso durante Gnumeric::canRead() antes de que el archivo sea rechazado o completamente analizado. Esto es alcanzable a través de la detección normal de tipos de archivo y las rutas de carga de Gnumeric, por lo que las aplicaciones que aceptan cargas de hojas de cálculo controladas por el atacante pueden sufrir denegación de servicio. Este problema ha sido solucionado en las versiones 5.8.1, 3.10.7, 2.4.7, 2.1.18 y 1.30.6."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "PHPOffice",
          "product": "PhpSpreadsheet",
          "versions": [
            {
              "version": ">= 4.0.0, < 5.8.1",
              "status": "affected"
            },
            {
              "version": ">= 3.3.0, < 3.10.7",
              "status": "affected"
            },
            {
              "version": ">= 2.2.0, < 2.4.7",
              "status": "affected"
            },
            {
              "version": ">= 2.0.0, < 2.1.18",
              "status": "affected"
            },
            {
              "version": "< 1.30.6",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-29T13:56:10.618961Z",
          "id": "CVE-2026-59932",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-409"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/commit/85f2556b0bf5269061bf45932ecda8a128d81750",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/1.30.6",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.1.18",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/2.4.7",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/3.10.7",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/releases/tag/5.8.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-2mrg-gjxq-2gvr",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/PHPOffice/PhpSpreadsheet/security/advisories/GHSA-2mrg-gjxq-2gvr",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}