CVE-2026-54560CWE-863

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

High · published July 15, 2026

CVSS v3.1
7.6
EPSS
0%
Percentile
39.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00463 · 39.1th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-07-15T14:40Z
EPSS history
Timeline
  • 15 JUL 14:40Z
    Cloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim
    cvelistv5