Excelize: Unbounded row number in Rows.Columns makes GetRows and the Rows iterator loop for days

{
  "id": "e231ce35d10c7e7f2c1f76b90e881b06823c6d952c33e09e7ae22b490921edee",
  "url": "https://osv.dev/vulnerability/GHSA-jw42-f3rr-4cc3",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Excelize: Unbounded row number in Rows.Columns makes GetRows and the Rows iterator loop for days",
    "summary": "### Summary A worksheet whose `` number is far past Excel's 1,048,576-row limit makes `File.GetRows` and the `Rows` iterator loop once for every missing row. The row limit is checked in `Rows.Next`, but not in `Rows.Columns`, which also reads `` elements. A 1.5 KB file with `` after an ordinary first row keeps `GetRows` busy for an estimated 11 days (about 4 ns per missing row), using one CPU core and little memory. Any service that calls `GetRows` or iterates `Rows` on an uploaded workbook can be tied up by a single request. ### Details `Rows.Next` checks the row number: ```go rowNum, _ := attrValToInt(\"r\", xmlElement.Attr) if rowNum > TotalRows { rows.err = ErrMaxRows return false } ``` But `Rows.Columns` reads the cells of the current row by consuming tokens until it reaches the *next* `` element, and it sets `rows.curRow` from that element's `r` without the check (rows.go, around line 179 at 3985c1f): ```go if rowNum, rowIterator.err = attrValToInt(\"r\", xmlElement.Attr); rowNum != 0 { rows.curRow = rowNum } ``` After that, `rows.curRow` is 231999999999940, and each later `Next()` call takes the `rows.curRow >= rows.seekRow` shortcut and returns `true` without reading any XML. `GetRows` then calls `Next()` and `Columns()` once per row number from 2 to 231999999999940. The check in `Next()` never runs, because the oversized `` element was already consumed by `Columns()`. If the oversized row is the *first* row, `Next()` reads it and the existing check works; `TestGetRows` c",
    "evidence": "osv:GHSA-jw42-f3rr-4cc3",
    "products": [
      {
        "name": {
          "value": "github.com/xuri/excelize/v2",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "2.11.1-0.20260930021559-01a9ff32fb3c",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "GHSA-jw42-f3rr-4cc3",
      "aliases": [
        "CVE-2026-107212",
        "GHSA-jw42-f3rr-4cc3",
        "GO-2026-6685"
      ],
      "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": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "2.1.0"
                },
                {
                  "fixed": "2.11.1-0.20260930021559-01a9ff32fb3c"
                }
              ]
            }
          ],
          "package": {
            "name": "github.com/xuri/excelize/v2",
            "purl": "pkg:golang/github.com/xuri/excelize/v2",
            "ecosystem": "Go"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-jw42-f3rr-4cc3/GHSA-jw42-f3rr-4cc3.json"
          }
        }
      ],
      "modified": "2026-10-19T21:40:42.350043538Z",
      "provider": "osv",
      "references": [
        "https://github.com/qax-os/excelize/security/advisories/GHSA-jw42-f3rr-4cc3",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-107212",
        "https://github.com/qax-os/excelize/pull/2438",
        "https://github.com/qax-os/excelize/commit/01a9ff32fb3c1f873cf01205e1b8a3285b0e1d23",
        "https://github.com/qax-os/excelize"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-770"
        ],
        "severity": "HIGH",
        "github_reviewed": true,
        "nvd_published_at": "2026-10-07T18:17:18Z",
        "github_reviewed_at": "2026-10-08T16:50:13Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107212",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 376729,
  "published_at": "2026-10-08T16:50:13+00:00"
}