# CVE-2026-46438: wger authorization bypass in workout log entry creation

Source: https://junglewise.ai/threats/cve-2026-46438-wger-cross-user-data-corruption-via-missing-ownership-check-on  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-07. Updated: 2026-10-07  
License: CC BY 4.0 with a link back

CVE-2026-46438 · Severity: medium · CVSS 6.5 · Published 2026-10-07

wger is a web-based workout manager that helps users track exercise routines and auto-generate training targets based on progression data. An authenticated attacker can inject fake workout entries into another user's training plan by bypassing ownership verification, causing the victim's auto-generated weight and repetition targets to become corrupted or dangerous.

Technologies: [wger (PyPI)](https://junglewise.ai/threats/technologies/wger), [Wger](https://junglewise.ai/threats/technologies/wger-wger). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi), [Wger](https://junglewise.ai/threats/vendors/wger).

## Quick answers

**Is CVE-2026-46438 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-46438 being exploited in the wild.

**How severe is CVE-2026-46438?** Medium severity, with a CVSS score of 6.5, published 7 October 2026.

**Which products and versions are affected?** wger (PyPI) <= 2.1, ECOSYSTEM:introduced=0,last_affected=2.1; Wger versions prior to patch.

**Is there a fix for CVE-2026-46438?** Yes: fixed in No fixed version specified in advisory. Until then: Add slot_entry to the ownership check list in WorkoutLogViewSet.get_owner_objects() and filter WorkoutLog queries by routine owner in SlotEntry.get_config_data(). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-46438 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-46438?** Check whether you run wger (PyPI) or Wger at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in No fixed version specified in advisory

Add slot_entry to the ownership check list in WorkoutLogViewSet.get_owner_objects() and filter WorkoutLog queries by routine owner in SlotEntry.get_config_data().

## Technical details

The vulnerability is a missing foreign-key ownership check in WorkoutLogViewSet.get_owner_objects(): the slot_entry field is not included in the ownership verification list, only routine and session are checked. An attacker can supply their own routine (which passes validation) alongside a victim's slot_entry ID (never verified) in a POST request. Additionally, SlotEntry.get_config_data() retrieves all linked WorkoutLog entries without filtering by user, so the attacker's injected logs silently corrupt the victim's progression calculations.

## Affected products

- wger wger versions prior to patch

## Identifiers

- CVE-2026-46438
- GHSA-rjpf-7pf5-q54x
- PYSEC-2026-4314

## Timeline

- 2026-10-07: disclosed: GHSA-rjpf-7pf5-q54x published
- 2026-01-15: other: PoC demonstrates vulnerability with crafted POST request

## Related threats

- [wger Trainer privilege escalation in user deactivation](https://junglewise.ai/threats/cve-2026-46434-wger-trainer-privilege-escalation-improper-privilege-management)
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- [wger trainer_login CSRF bypass via GET request](https://junglewise.ai/threats/cve-2026-45161-wger-trainer-login-accepts-get-csrf-bypass-enables-forced-session)
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- [wger CSV/TSV formula injection in gym member export](https://junglewise.ai/threats/cve-2026-86257-wger-csv-tsv-formula-injection-in-gym-member-export)