CVE-2026-50165: alf.io has Improper Access Control for Organization Owners that Exposes System Secrets
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
alf.ioto a version that resolves this vulnerability.Fixed in 2.0-M5-2605
Event History
Frequently Asked Questions
Who can exploit this issue?
An authenticated organization owner, or an owner of an event within an organization, can access the affected organization- or event-scoped single-configuration endpoints. No system administrator role is required.
What information could be exposed?
The endpoints can return system-level configuration values when supplied with an arbitrary configuration key. This includes the system API key if it is configured.
Which deployments are affected?
alf.io versions before 2.0-M5-2605 are affected. Exposure depends on an organization or event owner being able to query a key corresponding to a system-level secret.
How can I determine whether I may already be exposed?
Review whether organization or event owners have used the single-configuration endpoints to request system-level configuration keys, particularly the system API key. The provided information does not indicate whether such access is logged or otherwise detectable.
What is the remediation?
Upgrade alf.io to version 2.0-M5-2605. If the system API key may have been exposed, treat it as compromised and rotate it.