Excelize: Unbounded Row Index Allocation in Worksheet Parser (checkSheet OOM/Panic DoS)

{
  "id": "104fcd57395e8e4b4b20dd7b015e41692d95c1c05eb4ea80397eecc1ee7add86",
  "url": "https://osv.dev/vulnerability/CVE-2026-54063",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Excelize: Unbounded Row Index Allocation in Worksheet Parser (checkSheet OOM/Panic DoS)",
    "summary": "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 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.",
    "evidence": "osv:CVE-2026-54063",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-54063",
      "aliases": [
        "CVE-2026-54063",
        "GHSA-h69g-9hx6-f3v4",
        "GO-2026-5960"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/qax-os/excelize",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "90ff348959dd842cbf3a4fbd93a78afbe18db476"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.11.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "90ff348959dd842cbf3a4fbd93a78afbe18db476"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v2.11.0"
                  },
                  {
                    "cpe": "cpe:2.3:a:excelize:excelize:*:*:*:*:*:go:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.11.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.10.1",
            "v2.10.0",
            "v2.9.1",
            "v2.9.0",
            "v2.8.1",
            "v2.8.0",
            "v2.7.1",
            "v2.7.0",
            "v2.6.1",
            "v2.6.0",
            "v2.5.0",
            "v2.4.1",
            "v2.4.0",
            "v2.3.2",
            "v2.3.1",
            "v2.3.0",
            "v2.2.0",
            "v2.1.0",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v1.4.1",
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54063.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.923742237Z",
      "provider": "osv",
      "references": [
        "https://github.com/qax-os/excelize/releases/tag/v2.11.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54063.json",
        "https://github.com/qax-os/excelize/security/advisories/GHSA-h69g-9hx6-f3v4",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54063"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54063.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54063",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 519537,
  "published_at": "2026-07-10T15:53:31.02+00:00"
}