Missing Authorization in wger - CVE-2026-40474

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Main Vulnerability Database Vulnerabilities #VU126593

Missing Authorization in wger - CVE-2026-40474

Published: April 20, 2026


Vulnerability identifier: #VU126593
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-40474
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: wger Project
Affected software:
wger

Detailed vulnerability description

The vulnerability allows a remote user to modify installation-wide configuration and other users' records.

The vulnerability exists due to missing authorization in the GymConfigUpdateView endpoint at /config/gym-config/edit when handling authenticated configuration update requests. A remote user can submit a specially crafted request to modify installation-wide configuration and other users' records.

The affected object is a singleton GymConfig instance, and saving changes can trigger installation-wide side effects including bulk updates to user profile gym assignments.


How to mitigate CVE-2026-40474

Install security update from vendor's website.

Sources