CVE-2026-43978 wger: Privilege escalation via trainer-login session chaining allows gym trainers to impersonate gym managers

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...

CVE-2026-43978

CVE-2026-43978 describes a privilege-escalation in wger prior to version 2.6 where a gym trainer can chain two trainer-login calls to impersonate higher-privileged users (gym manager/general manager). The root cause is a logic error in wger/core/views/user.py: after the first hop, session["traine...

CVE-2026-43978 wger: Privilege escalation via trainer-login session chaining allows gym trainers to impersonate gym managers

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...