VYPR
High severityNVD Advisory· Published Jul 15, 2026· Updated Jul 15, 2026

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

CVE-2026-54560

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.

Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/cloudreve/Cloudreve/v4Go
>= 4.0.0-20260114075425-bc6845bd742c, < 4.0.0-20260606015557-ed20843dc3df4.0.0-20260606015557-ed20843dc3df

Affected products

1

Patches

Vulnerability mechanics

References

5

News mentions

0

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