Security advisory

{
  "id": "125636bf0b8a85a5974ef15d8d6197a7eea65cf73351a877928e11880fbf468b",
  "url": "https://osv.dev/vulnerability/CVE-2020-27819",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-27819",
    "summary": "An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointer dereference vulnerability exists when parsing XLS cells in libxls/xls2csv.c:199. It could allow a remote attacker to cause a denial of service via crafted XLS file.",
    "evidence": "osv:CVE-2020-27819",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-27819",
      "aliases": [
        "CVE-2020-27819"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/libxls/libxls",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "448240067919707eb95fb009f76f3fdb439b1427"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:libxls_project:libxls:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.6.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.6.2-rc0",
            "v1.6.1",
            "v1.6.0",
            "v1.6.0-rc0",
            "v1.5.3",
            "v1.5.3-rc0",
            "v1.5.2",
            "v1.5.2-rc0",
            "v1.5.1",
            "v1.5.1-rc1",
            "v1.5.1-rc0",
            "v1.5.0",
            "v1.5.0-rc4",
            "v1.5.0-rc3",
            "v1.5.0-rc2",
            "v1.5.0-rc1",
            "v1.5.0-rc0",
            "v1.4.0",
            "v1.3.4",
            "v1.3.3",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2.1",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0",
            "v0.3.0",
            "v0.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27819.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:25.724793615Z",
      "provider": "osv",
      "references": [
        "https://bugzilla.redhat.com/show_bug.cgi?id=1903296"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-27819",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 431430,
  "published_at": "2021-02-23T04:15:13.883+00:00"
}