{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.10.1"
              },
              {
                "last_affected": "2.11.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "5ad5ab3af0054c55bdce09f1530085600e9f2e45"
            },
            {
              "fixed": "ecd99d761fe0489f1ed308e2f7dc2e0502d1a396"
            }
          ],
          "repo": "https://github.com/qax-os/excelize",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8jjq-8j9w-m2v6"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-129"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107218.json"
  },
  "details": "Excelize is a Go language library for reading and writing Microsoft Excel spreadsheets. From 2.10.1 to 2.11.0, RIGHT validates the requested length with UTF-16 code-unit counts but slices a rune array using Unicode code-point counts. RIGHT reaches leftRight through CalcCellValue, where countUTF16String validates one unit but utf8.RuneCountInString supplies the slice index in another. When RIGHT evaluates supplementary-plane text with a requested character count between the rune count and UTF-16 code-unit count, the inconsistent units produce a negative rune-slice index, allowing an attacker to panic during formula evaluation. No fixed version is available as of this review.",
  "id": "CVE-2026-107218",
  "modified": "2026-10-09T02:30:44.786942031Z",
  "published": "2026-10-07T18:29:38.606Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107218.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/qax-os/excelize/security/advisories/GHSA-8jjq-8j9w-m2v6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107218"
    },
    {
      "type": "FIX",
      "url": "https://github.com/qax-os/excelize/commit/ecd99d761fe0489f1ed308e2f7dc2e0502d1a396"
    },
    {
      "type": "FIX",
      "url": "https://github.com/qax-os/excelize/pull/2390"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Excelize: RIGHT() on supplementary-plane text slices with a negative index and panics"
}