CVE-2026-50199 Wallos: Cross-user Fixer/API Layer credential consumption in exchange-rate refresh
Authenticated users can trigger exchange-rate refreshes using another user's stored API credentials due to missing per-user authorization checks.
- 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-2026-50199?
CVE-2026-50199 is a medium-severity missing authorization vulnerability in ellite Wallos, published on 31 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.1, endpoints/currency/update_exchange.php loads the first Fixer/API Layer credential globally instead of loading the credential for the authenticated user. As a result, a normal authenticated user without their own provider key can trigger exchange-rate refreshes using another user's stored provider credential. This issue has been patched in version 4.9.1.
Weakness: CWE-863
Which versions are affected by CVE-2026-50199?
How do I fix CVE-2026-50199?
No fix has been published for CVE-2026-50199 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-2026-50199 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-50199 exists.
Sources
Also known as GHSA-5wf4-m4hj-rxj5.