CVE-2026-56765: Authorization Bypass Through User-Controlled Key

Vikunja before 2.2.1 contains an authorization flaw where the LinkSharing.ReadAll endpoint exposes share hashes to users with read access, enabling permission escalation to admin-level shares. The GetTaskAttachment endpoint performs permission checks against user-supplied task IDs but fetches...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS via the GetTaskAttachment handler in the API attachment download component. An attacker can execute arbitrary JavaScript and expose authentication tokens by uploading an SVG attachment whose crafted filename...