CVE-2026-62323Medium· 6.3▾ SunlitCloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, ViewerSessionValidation uses only the session-id prefix of a WOPI access token and does not enforce the requested viewer action, allowing a malicious or comp…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 34.7 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 31.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.3%
Last analysed / modified upstream
Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, ViewerSessionValidation uses only the session-id prefix of a WOPI access token and does not enforce the requested viewer action, allowing a malicious or compromised WOPI viewer with a view session to forge the token suffix and invoke WOPI write routes for the underlying file. This issue is fixed in version 4.17.0.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
github.com/cloudreve/Cloudreve/v4 < 4.0.0-20260626022433-f3347130ac48github.com/cloudreve/Cloudreve/v3 <= 3.0.0-20250225100611-da4e44b77af4Patched in:
github.com/cloudreve/Cloudreve/v4 4.0.0-20260626022433-f3347130ac48Connected by shared product, vendor, weakness, or advisory.
GHSA-v6w6-358x-2433Medium· 5.4Cloudreve Admin.Read OAuth tokens can trigger server-side node test requests
CVE-2026-55499Medium· 4.3Cloudreve is a self-hosted file management and sharing system
CVE-2026-55502High· 7.1Cloudreve is a self-hosted file management and sharing system
CVE-2026-54563High· 7.1Cloudreve WebDAV (`/dav`) has Path Traversal / Broken Access Control — scoped DAV credential escapes its configured account root
GHSA-vx2m-jpxr-xv7wMedium· 5.3Cloudreve has Broken Access Control - Revoked Share Access Still Allows Signed File URL Generation via Cached context_hint
CVE-2026-55495Medium· 4.3Cloudreve is a self-hosted file management and sharing system