CVE-2026-86257CWE-1236

wger before 2.6 CSV Formula Injection via member export

Medium · published September 6, 2026

CVSS v3.1

5.4

EPSS

—

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 5.4 · MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0: 4.8 · 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
EPSS: Not scored
Weakness: CWE-1236 · Improper Neutralization of Formula Elements in a CSV File
Published: 2026-09-06T12:00Z

Timeline

06 SEP 12:00Z
wger before 2.6 CSV Formula Injection via member export
cvelistv5