CVE-2026-54063

{
  "id": "CVE-2026-54063",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-10T17:16:58.440",
  "lastModified": "2026-10-25T15:10:00.147",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. Prior to 2.11.0, the checkSheet() function in github.com/xuri/excelize/v2 uses an attacker-controlled <row r=\"N\"> XML attribute value directly as the length argument to make([]xlsxRow, row) without validating it against the Excel row limit (TotalRows = 1,048,576). A specially crafted XLSX file can trigger two denial-of-service variants: (A) an out-of-memory process kill when r=2147483647 forces a ~16 GB allocation attempt, and (B) a runtime panic via out-of-bounds slice indexing when r=-1. Any service that opens attacker-supplied XLSX files and calls GetCellValue is affected. No authentication is required. This issue is fixed in version 2.11.0."
    },
    {
      "lang": "es",
      "value": "Excelize es una biblioteca del lenguaje Go para leer y escribir hojas de cálculo de Microsoft Excel. Antes de la versión 2.11.0, la función checkSheet() en github.com/xuri/excelize/v2 utiliza un valor de atributo XML <row r=’N’> controlado por un atacante directamente como argumento de longitud para make([]xlsxRow, row) sin validarlo contra el límite de filas de Excel (TotalRows = 1,048,576). Un archivo XLSX especialmente diseñado puede desencadenar dos variantes de denegación de servicio: (A) una terminación de proceso por falta de memoria cuando r=2147483647 fuerza un intento de asignación de ~16 GB, y (B) un pánico en tiempo de ejecución a través de la indexación de segmentos fuera de límites cuando r=-1. Cualquier servicio que abra archivos XLSX suministrados por un atacante y llame a GetCellValue se ve afectado. No se requiere autenticación. Este problema se solucionó en la versión 2.11.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "qax-os",
          "product": "excelize",
          "versions": [
            {
              "version": "< 2.11.0",
              "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": "2026-07-10T18:39:45.896640Z",
          "id": "CVE-2026-54063",
          "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-770"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*",
              "versionEndExcluding": "2.11.0",
              "matchCriteriaId": "3109CFB1-75AF-4979-A10A-21F859C5D249"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/qax-os/excelize/releases/tag/v2.11.0",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}