CVE-2026-54560 — Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim
Cloudreve is a self-hosted file management and sharing system. From 4.12.0 until 4.16.1, Cloudreve's OAuth access tokens are issued without the OAuth client_id claim, so the JWT…
Published: 2026-07-15 · CVSS: 7.6 · CVSS 3.1
Cloudreve is a self-hosted file management and sharing system. From 4.12.0 until 4.16.1, Cloudreve's OAuth access tokens are issued without the OAuth client_id claim, so the JWT verifier does not load token scopes into request context and RequiredScopes treats the request like non-scoped session authentication, allowing a low-scope OAuth access token to call APIs requiring higher scopes such as file, share, workflow, user setting, WebDAV account, and potentially admin scopes. This issue is fixed in version 4.16.1.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7