---
id: CVE-2026-86257
title: >-
  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
summary: >-
  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 ex…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cwe:
  - CWE-1236
vendor: wger-project
product: wger
affected:
  - wger < 2.6
published: '2026-09-06'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:59:42.500'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86257'
references:
  - url: >-
      https://github.com/wger-project/wger/security/advisories/GHSA-xq9m-hmp9-fw87
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wger-before-2.6-csv-formula-injection-via-member-export
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/wger-project/wger/security/advisories/GHSA-xq9m-hmp9-fw87
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/wger-project/wger'
tags:
  - nvd
  - cve.org
  - exploit-available
  - osv
  - pip
  - score-dispute
epss: 0.00277
epssPercentile: 0.17918
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-08T15:09:37.303676Z'
ingestedAt: '2026-09-07T04:04:50.805Z'
aliases:
  - GHSA-xq9m-hmp9-fw87
ecosystem: pip
patched:
  - wger 2.6
scores:
  nvd: 5.4
  osv: 7.4
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-86257)

Affected packages:

- `wger < 2.6`

Patched in:

- `wger 2.6`

Source: https://osv.dev/vulnerability/GHSA-xq9m-hmp9-fw87