CVE-2026-86257: Improper Neutralization of Formula Elements in a CSV File in wger-project wger
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.
CVE-2026-86257: Improper Neutralization of Formula Elements in a CSV File in wger-project wger
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 v4.0
Score 4.8medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-06T11:35:19.317Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a9d5b10acd9273b49b9c598
Added to database: 09/06/2026, 12:22:40 UTC
Last updated: 09/06/2026, 16:26:29 UTC
Views: 10
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