CVE-2026-54560: cloudreve Incorrect Authorization
Vulnerability summary
CVE-2026-54560 is a high (CVSS 7.6) Incorrect Authorization vulnerability in cloudreve. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 39% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 1 · Related 1Timeline
- 15-07-2026PublishedVulnerability first disclosed.
- 15-07-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
3 scores · 3 sources · 1 version- OSV · GoEcosystem advisory · calculated7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
- NVDNIST7.6HighCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:L
EPSS trend
Probability
0.46%
Chance of exploitation in the next 30 days
Percentile
39%
Versus all other CVEs
30-day change
0.00 pp
From 0.46% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Github.com/cloudreve/Cloudreve2 products
- v3All versions (No fix recorded)
- v4≥ 4.0.0-20260114075425-bc6845bd742c, < 4.0.0-20260606015557-ed20843dc3df
Cloudreve1 product
- cloudreve≥ 4.12.0, < 4.16.1
Github.com/cloudreve1 product
- CloudreveAll versions (No fix recorded)
3 vendors · 4 products
References
5 links- github.com/cloudreve/cloudreve/security/advisories/GHSA-vgj4-345g-jcf8X Refsource CONFIRMWEBAdvisory
