OAuth Token Mismanagement in Cloudreve File Management System
CVE-2026-54560

7.6HIGH

Key Information:

Vendor

Cloudreve

Status
Cloudreve
Vendor
CVE Published:
15 July 2026

What is CVE-2026-54560?

A vulnerability in Cloudreve's file management system allows OAuth access tokens to be issued without the client_id claim. As a result, the JWT verifier fails to load necessary token scopes into the request context. This oversight creates a risk where a low-scope token can access APIs intended for higher permission levels, such as file sharing, user settings, and potentially administrative functions. The issue has been addressed in version 4.16.1, significantly enhancing the security of OAuth interactions.

Affected Version(s)

cloudreve >= 4.12.0, < 4.16.1

References

https://github.com/cloudreve/cloudreve/security/advisorie...
x_refsource_CONFIRM
https://github.com/cloudreve/cloudreve/commit/ed20843dc3d...
x_refsource_MISC
https://github.com/cloudreve/cloudreve/releases/tag/4.16.1
x_refsource_MISC

CVSS V3.1

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.