Authorization bypass through user-controlled key in wger - CVE-2026-46438
Published: October 5, 2026
Vulnerability identifier: #VU153252
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-46438
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to corrupt other users' training data.
The vulnerability exists due to missing authorization in WorkoutLogViewSet when processing POST requests to the /api/v2/workoutlog/ endpoint. A remote user can submit a workout log containing a victim's slot_entry identifier to corrupt other users' training data.
Exploitation requires a victim SlotEntry identifier and a routine owned by the user.
Affected software
wger
How to mitigate CVE-2026-46438
Install security update from vendor's website.
wger - update to 2.6