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CVE-2026-55502GHSA-HQ88-5X99-X3GFGO-2026-6101

Cloudreve: OAuth Admin.Read scope can update OneDrive storage policy credentials

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 4.17.0
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: partial

Summary

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, POST /api/v4/admin/policy/oauth/signin requires only Admin.Read even though GetOauthRedirectService persists caller-supplied OneDrive secret and app_id values, allowing an OAuth token without Admin.Write to modify storage policy credentials. The route is inside the admin group that requires Admin.Read, but it does not add the local Admin.Write guard used by sibling policy mutation routes. Its handler persists attacker-supplied secret and app_id values into the selected OneDrive storage policy before returning an OAuth URL. This issue is fixed in version 4.17.0.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • cloudreve cloudreve

    fixed in 4.17.0

  • github.com/cloudreve/Cloudreve/v4Go

    fixed in 4.17.0

  • github.com/cloudreve/Cloudreve/v3Go

    through 3.0.0-20250225100611-da4e44b77af4

  • github.com/cloudreve/CloudreveGo

    All versions

  • github.com/cloudreve/Cloudreve/v3Go

    All versions

  • github.com/cloudreve/Cloudreve/v4Go

    All versions

References 1

GitHub · cloudreve/cloudreve