CVE-2026-54560
High
Description
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.
SeverityHigh
CVSS7.6
Exploit probability—
ProductGithub.com/cloudreve/cloudreve/v4
PublishedJul 15, 2026
First seenJul 15, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- github.com/cloudreve/Cloudreve/v44.0.0-20260606015557-ed20843dc3df or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| github.com/cloudreve/Cloudreve/v4Go | 4.0.0-20260114075425-bc6845bd742c ≤ v < 4.0.0-20260606015557-ed20843dc3df | 4.0.0-20260606015557-ed20843dc3df |
| github.com/cloudreve/CloudreveGo | No range specified | — |
| github.com/cloudreve/Cloudreve/v3Go | No range specified | — |
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