CVE-2026-50165 alf.io has Improper Access Control for Organization Owners that Exposes System Secrets
Organization owners can read system-level configuration secrets, including API keys, due to improper access control in configuration 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-2026-50165?
CVE-2026-50165 is a high-severity missing authorization vulnerability in alfio-event alf.io, published on 9 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
alf.io is an open source ticket reservation system for conferences, trade shows, workshops, and meetups. An Improper Access Control issue in versions prior to 2.0-M5-2605 allows an organization owner to read system-level configuration secrets through organization/event scoped "single configuration" endpoints. The affected endpoints require organization or event ownership, but they accept an arbitrary configuration key and then return the first matching value from a lookup that includes system-level configuration. As a result, an organization owner can retrieve secrets intended to be administrator-only, including the system API key when it is configured. Version 2.0-M5-2605 fixes the issue.
Weakness: CWE-284
Which versions are affected by CVE-2026-50165?
How do I fix CVE-2026-50165?
No fix has been published for CVE-2026-50165 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-2026-50165 being exploited?
There is no known exploitation of CVE-2026-50165 in the wild and no public exploit code.
Sources
Also known as GHSA-x473-r8w6-fcq5.