{"cve":"CVE-2026-86257","nvd":{"published":"2026-09-06T12:17:16.700","modified":"2026-09-08T19:59:42.500","status":"Deferred","description":"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.","cvss_v4":{"vector":"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","score":4.8},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N","score":5.4},"cwes":["CWE-1236"],"references":["https://github.com/wger-project/wger/security/advisories/GHSA-xq9m-hmp9-fw87","https://www.vulncheck.com/advisories/wger-before-2.6-csv-formula-injection-via-member-export","https://github.com/wger-project/wger/security/advisories/GHSA-xq9m-hmp9-fw87"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:52:03.409947763+00:00"},"epss":{"cve":"CVE-2026-86257","score":0.00277,"percentile":0.20193,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-xq9m-hmp9-fw87","url":"https://osv.dev/vulnerability/GHSA-xq9m-hmp9-fw87","summary":"wger: CSV/TSV formula injection in gym member export (first_name/last_name)","modified":"2026-09-10T03:51:07.207761186Z","packages":[{"ecosystem":"PyPI","name":"wger","purl":"pkg:pypi/wger","ranges":["<2.6"],"fixed":["2.6"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}