CVE-2026-54560
Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim
CVSS Score
7.6
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-863 |
| Vendor | cloudreve |
| Product | cloudreve |
| Published | Jul 15, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low
Affected Versions
cloudreve / cloudreve
>= 4.12.0, < 4.16.1