Auth bypass in Wger-Project Wger
CVE-2026-46438
wger is a free, open-source workout and fitness manager. Prior to version 2.6, an authenticated attacker can inject arbitrary workout log entries into any other user's `SlotEntry` by supplying the victim's `slot_entry` ID in a `POST /api/v2/workoutlog/` request. The `slot_entry` foreign key is not included in the ownership verification performed by `WorkoutLogViewSet.get_owner_objects()`, so the server accepts and persists the cross-user reference without error. Because `SlotEntry.get_config_data()` retrieves associated logs via `self.workoutlog_set.all()` with no user filter, the attacker's injected data is silently folded into the victim's progressive-overload calculations, corrupting their auto-generated weight and repetition targets. Version 2.6 contains a patch.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Wger-Project Wger — versions < 2.6
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-46438?
- CVE-2026-46438 is a medium-severity vulnerability in Wger-Project Wger, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-10-07.
- How severe is CVE-2026-46438?
- Medium severity. CVSS v3 base score is 6.5 out of 10.