alfio-event alf.io up to 2.0-M5-2605 access control

Summaryinfo

A vulnerability categorized as problematic has been discovered in alfio-event alf.io up to 2.0-M5-2605. This issue affects some unknown processing. Executing a manipulation can lead to access control. This vulnerability appears as CVE-2026-50165. The attack may be performed from remote. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in alfio-event alf.io up to 2.0-M5-2605. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-50165 since 06/03/2026. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1068 by the MITRE ATT&CK project.

Upgrading to version 2.0-M5-2606 eliminates this vulnerability.

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Productinfo

Vendor

• alfio-event

Name

• alf.io

Version

• 2.0-M5-2605

Website

• Product: https://github.com/alfio-event/alf.io/

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