CVE-2026-27835 MEDIUM

CVE-2026-27835: wger: IDOR in RepetitionsConfig and MaxRepetitionsConfig API leak other users' workout data

Vendor Wger-Project
Product wger
Weakness CWE-639 · IDOR
Published February 26, 2026
Last update March 3, 2026

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

What the vulnerability does

01Description

wger is a free, open-source workout and fitness manager. In versions up to and including 2.4, `RepetitionsConfigViewSet` and `MaxRepetitionsConfigViewSet` return all users' repetition config data because their `get_queryset()` calls `.all()` instead of filtering by the authenticated user. Any registered user can enumerate every other user's workout structure. Commit 1fda5690b35706bb137850c8a084ec6a13317b64 contains a fix for the issue.

Key dates

02Disclosure timeline

February 26, 2026 CVE published
March 3, 2026 Record updated