Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim

Summary Cloudreve's OAuth access tokens can bypass OAuth scope enforcement. This does not appear to be the intended design. The documentation describes OAuth client permissions/scopes, the API has an insufficient-scope error code, and the code comments say RequiredScopes... should verify scopes...

CVE-2026-54560

CVE-2026-54560 affects Cloudreve prior to version 4.16.1, where OAuth access tokens could be issued without the OAuth client_id claim. The missing client_id causes the JWT verifier to not load token scopes into the request context, making RequiredScopes treat the request as unscoped session authe...