CVE-2026-43978
High · 8.1wger: Privilege escalation via trainer-login session chaining allows gym trainer to impersonate gym manager
CVSS
8.1
EPSS
0.4%
Published
May 14, 2026
CISA due date
—
The record
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, allowing the trainer to hop into any account including gym managers.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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