CVE-2026-77170: Improper Access Control

The Deck config API allows authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating whether the user owns or has permission to manage the referenced board...

Nextcloud: Arbitrary Board Preference Injection via Deck Config API

A vulnerability was discovered in the Deck Config API of the Nextcloud application that allowed authenticated users to set board-scoped configuration keys for arbitrary board IDs without validating the user's ownership or permission to manage the referenced board...