CVE-2026-40474 wger has Broken Access Control in the Global Gym Configuration Update Endpoint
Authenticated users can modify global gym configuration due to missing permission checks, leading to privilege escalation and bulk profile updates.
- 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-2026-40474?
CVE-2026-40474 is a high-severity missing authorization vulnerability in wger-project wger, published on 17 Apr 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 2.5 and below, the GymConfigUpdateView declares permission_required = 'config.change_gymconfig' but inherits WgerFormMixin instead of WgerPermissionMixin, so the permission is never enforced at runtime. Since GymConfig is an ownerless singleton, any authenticated user can modify the global gym configuration, triggering save() side effects that bulk-update user profile gym assignments — a vertical privilege escalation to installation-wide configuration control. This issue is fixed in version 2.5.
Which versions are affected by CVE-2026-40474?
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-2026-40474?
No fix has been published for CVE-2026-40474 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-2026-40474 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40474 exists.
Other vulnerabilities in wger-project wger
- CVE-2022-2650 Improper Restriction of Excessive Authentication Attempts in wger-project/wger
- CVE-2026-40353 wger: Stored XSS via Unescaped License Attribution Fields
- CVE-2026-27835 wger: IDOR in RepetitionsConfig and MaxRepetitionsConfig API leak other users' workout data
- 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-xppv-4jrx-qf8m, PYSEC-2026-3424.