Only the latest OpenBook release is supported. Desktop builds use the built-in updater, so please install any available update before reporting or reproducing a problem.

Email security@lab255.io privately. Do not open a public issue for a security bug. Include reproduction steps and the affected OpenBook version and platform.

Lab255 Private Limited aims to acknowledge reports within 5 business days and will work with you to coordinate disclosure. For general, non-security help, email help@lab255.io.

The OpenBook desktop app, the account and forwarding services at book.pub and book.cloud, and the OpenBook plugin registry are in scope. Third-party plugins are the publisher's responsibility; report issues to their publisher.