What’s Vulnerable › Vulnerabilities

CVE-2026-46438: wger: Cross-User Data Corruption via Missing Ownership Check on WorkoutLog.slot_entry

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-07 · updated 2026-10-07
• Weakness: CWE-639

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.

Affected products

• wger-project wger: before 2.6

References

• https://github.com/wger-project/wger/releases/tag/2.6
• https://github.com/wger-project/wger/security/advisories/GHSA-rjpf-7pf5-q54x
• https://github.com/wger-project/wger/security/advisories/GHSA-rjpf-7pf5-q54x

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