CVE-2026-86257

MEDIUMCVSS 5.4

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.

Timeline

Published:September 6th, 2026 12:17 PM

Last modified:September 6th, 2026 12:17 PM

CVSS Scoring

CVSS v3: 5.4 (MEDIUM)

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Weaknesses (CWE)

CWE-1236

References & Reports

Advisories, patches, and third-party reports

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

Source: NIST NVD · Data may lag official sources by up to one minute