CVE-2026-86257

wger before 2.6 CSV Formula Injection via member export

Published Sep 6, 2026 CVSS 4.0 · 4.8 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title wger before 2.6 CSV Formula Injection via member export
First Time appeared Wger
Wger wger
Weaknesses CWE-1236
CPEs cpe:2.3:a:wger:wger:*:*:*:*:*:*:*:*
Vendors & Products Wger
Wger wger
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 4.8, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 8, 2026, 3:10 PM
Reserved
Sep 6, 2026, 11:35 AM
Status
Deferred
Published
Sep 6, 2026, 12:17 PM
Modified
Sep 8, 2026, 7:59 PM