CVE-2026-27835 wger: IDOR in RepetitionsConfig and MaxRepetitionsConfig API leak other users' workout data
Attackers can view other users' workout data due to missing authorization checks in API endpoints.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-27835?
CVE-2026-27835 is a medium-severity missing authorization vulnerability in wger-project wger, published on 26 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-27835?
3 open source packages ship an affected version, including wger. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
wger PyPI | All versions to 2.1 | None |
wger PyPI | All versions to 2.1 | None |
wger PyPI | All versions to 2.1 | None |
Products include Wger Wger.
How do I fix CVE-2026-27835?
No fix has been published for CVE-2026-27835 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-27835 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-27835 exists.
Other vulnerabilities in wger-project wger
- CVE-2022-2650 Improper Restriction of Excessive Authentication Attempts in wger-project/wger
- CVE-2026-40474 wger has Broken Access Control in the Global Gym Configuration Update Endpoint
- CVE-2026-40353 wger: Stored XSS via Unescaped License Attribution Fields
- CVE-2026-27839 wger: IDOR in nutritional_values endpoints exposes private dietary data via direct ORM lookup
- CVE-2026-27838 wger: IDOR via user-unscoped cache keys on routine API actions exposes workout data
Sources
Also known as GHSA-xf68-8hjw-7mpm, PYSEC-2026-3423.