CVE-2026-86257— wger before 2.6 CSV Formula Injection via member export
Quick assessment
Affected
wger-project wger
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
wger 在 2.6 之前的版本中，健身房会员 TSV 导出接口未能对 和 字段进行清洗，允许任意健身房会员注入电子表格公式。攻击者可以注入诸如 的公式，从而在管理员使用 Excel 或 LibreOffice Calc 打开导出的文件时，窃取管理员数据或执行代码。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| wger-project | wger | < 2.6 |
affected |
2.6 |
unaffected |
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I. Basic Information for CVE-2026-86257
Vulnerability Information
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Vulnerability Title
wger before 2.6 CSV Formula Injection via member export
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1236
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| wger-project | wger | 0 ~ 2.6 | - |
|
II. Public POCs for CVE-2026-86257
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-86257 (2)
Same Patch Batch · wger-project · 2026-09-06 · 4 CVEs total
| CVE-2026-86254 | 6.8 MEDIUM | wger Incomplete Authorization Fix Cross-Tenant Account Deletion |
| CVE-2026-86255 | 6.5 MEDIUM | wger before 2.5 Uncontrolled Resource Consumption via date_sequence |
| CVE-2026-86256 | 5.4 MEDIUM | wger before 2.6 Open Redirect via trainer-login next parameter |
IV. Related Vulnerabilities
Same product: wger
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CVE-2026-86255
wger before 2.5 Uncontrolled Resource Consumption via date_s -
CVE-2026-86256
wger before 2.6 Open Redirect via trainer-login next paramet -
CVE-2026-86254
wger Incomplete Authorization Fix Cross-Tenant Account Delet -
CVE-2026-82544
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CVE-2026-43977
wger IDOR: Authenticated Users Can Read Others' Private Work
Same vendor: wger-project
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wger before 2.5 Uncontrolled Resource Consumption via date_s -
CVE-2026-86256
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CVE-2026-86254
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CVE-2026-82544
wger-project wger Password Reset gym.py reset_user_password -
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Same weakness: CWE-1236
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V. Comments for CVE-2026-86257
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