CVE-2026-62323 — Cloudreve: Unauthorized file write via WOPI view sessions whose access token secret is ignored
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 enfor…
Published: 2026-07-31 · CVSS: 6.3 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7