CVE-2026-46438
wger: Cross-User Data Corruption via Missing Ownership Check on WorkoutLog.slot_entry
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | wger | <= 2.1 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-rjpf-7pf5-q54x
- https://github.com/wger-project/wger/security/advisories/GHSA-rjpf-7pf5-q54x
- https://github.com/wger-project/wger/releases/tag/2.6
- https://nvd.nist.gov/vuln/detail/CVE-2026-46438
- https://github.com/wger-project/wger/commit/b29cf178651bbcc243d21673932e32bd42017893
- https://github.com/pypa/advisory-database/tree/main/vulns/wger/PYSEC-2026-4314.yaml
- https://pypi.org/project/wger