CVE-2026-43978

wger is a free, open-source workout and fitness manager. In versions prior to 2.6, a gym trainer can escalate their session to any higher-privileged account (gym manager, general manager) by chaining two calls to the trainer-login endpoint. Once a trainer performs a legitimate switch into a low-privileged user, the session flag trainer.identity is set and this flag alone bypasses the permission check on all subsequent trainer-login calls. This grants full gym administration capabilities including viewing all member data, modifying contracts, managing gym configuration, and accessing other trainers' and managers' personal information. This issue has been fixed in version 2.6.

• CWE-269

• https://github.com/wger-project/wger/security/advisories/GHSA-9qpr-vc49-hqg2
• https://github.com/wger-project/wger/security/advisories/GHSA-9qpr-vc49-hqg2

Published

Jul 16, 2026

Last Modified

Jul 17, 2026

Status

Deferred

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