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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-rjpf-7pf5-q54x wger: Cross-User Data Corruption via Missing Ownership Check on WorkoutLog.slot_entry
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 07 Oct 2026 14:15:00 +0000

Type Values Removed Values Added
Description 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.
Title wger: Cross-User Data Corruption via Missing Ownership Check on WorkoutLog.slot_entry
Weaknesses CWE-639
CWE-862
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-07T14:00:10.046Z

Reserved: 2026-05-13T22:18:22.830Z

Link: CVE-2026-46438

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-07T14:17:10.650

Modified: 2026-10-07T14:46:03.387

Link: CVE-2026-46438

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses