CVE-2026-108264 Wizarr: Authenticated Server-Side Template Injection (SSTI) in wizard step rendering leads to Remote Code Execution (RCE)

Wizarr is an advanced user invitation and management system for Jellyfin, Plex, Emby, and other media servers. Prior to 2026.9.1, wizard step Markdown supplied through the editor or imported bundles was evaluated by app/blueprints/wizard/routes.py in the application's non-sandboxed Jinja2...

CVE-2026-108264

Wizarr, a management system for media servers like Jellyfin and Plex, is vulnerable to Server-Side Template Injection (SSTI) prior to version 2026.9.1 . The issue exists because wizard step Markdown—provided via the editor or imported bundles—is evaluated in a non-sandboxed Jinja2 environment wit...