Vulnerability · Published Sep 6, 2026 · Assigned by VulnCheck
CVE-2026-86257wger before 2.6 CSV Formula Injection via member export
Medium 5.4
In plain English
A medium-severity security flaw in wger from wger-project. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.3%top 79.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| PyPI | wger | 2.6 | GHSA-xq9m-hmp9-fw87 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| wger-project | wger | 0 – before 2.6 |
Weakness: CWE-1236 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
- GitHub Security Advisory (GHSA-xq9m-hmp9-fw87) vendor-advisory
- VulnCheck Advisory: wger before 2.6 CSV Formula Injection via member export third-party-advisory