CVE-2026-54560
HIGHCloudreve: OAuth access tokens bypass scope enforcement due to missing client_id claim
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/cloudreve/cloudreve/security/advisories/GHSA-vgj4-345g-jcf8
X_Refsource_Misc x_refsource_misc
https://github.com/cloudreve/cloudreve/commit/ed20843dc3df20a25fcaf6b538647e11c4d68d87
X_Refsource_Misc x_refsource_misc
https://github.com/cloudreve/cloudreve/releases/tag/4.16.1
Scores
CVSS v3
7.6
EPSS
0.0025
EPSS Percentile
16.1%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-863
Status
published
Products (2)
cloudreve/Cloudreve
4.0.0-20260114075425-bc6845bd742c - 4.0.0-20260606015557-ed20843dc3dfGo
cloudreve/cloudreve
>= 4.12.0, < 4.16.1
Published
Jul 15, 2026
Tracked Since
Jul 15, 2026