CVE-2026-72789: SiYuan: The publish-access gate treats encrypted notebooks as publicly accessible by default, allowing anonymous readers to retrieve fully decrypted document content while a notebook is unlocked

publishAccess.json is an opt-out list. The publish gate returns accessible for anything not explicitly listed in it. Encrypted notebooks are never written into that file, because only the administrator-gated setPublishAccess writes it and no part of the encryption subsystem does. Consequently every encrypted notebook is publish-accessible as far as the gate is concerned.

While an encrypted notebook is unlocked, an anonymous reader in publish mode can list it, enumerate its documents, and retrieve their fully decrypted content. No key material, no password, and no cracking is involved. The kernel decrypts the data and serves it because the authorization layer never asks whether the notebook is encrypted.

This is reported as a defect in the gate rather than in any individual handler. Endpoints that were previously reviewed and found to apply the correct checks do apply them. The checks return true.