{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "2.6"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "e1d70bcc38cd56ae4a254dca1713c404d069f319"
            }
          ],
          "repo": "https://github.com/wger-project/wger",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-xq9m-hmp9-fw87"
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-1236"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86257.json"
  },
  "details": "wger before 2.6 fails to sanitize first_name and last_name fields in the gym member TSV export endpoint, allowing any gym member to inject spreadsheet formulas. Attackers can inject formulas like =HYPERLINK to exfiltrate admin data or execute code when admins open the exported file in Excel or LibreOffice Calc.",
  "id": "CVE-2026-86257",
  "modified": "2026-09-10T03:31:04.220532698Z",
  "published": "2026-09-06T12:00:30.969Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86257.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/wger-project/wger/security/advisories/GHSA-xq9m-hmp9-fw87"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-86257"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/wger-before-2.6-csv-formula-injection-via-member-export"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "wger before 2.6 CSV Formula Injection via member export"
}