medium6.3
CVE-2026-62323
Cloudreve WOPI view sessions can write files and WOPI access token secret is ignored
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/cloudreve/Cloudreve/v4 | < 4.0.0-20260626022433-f3347130ac48 | 4.0.0-20260626022433-f3347130ac48 |
| go | github.com/cloudreve/Cloudreve/v3 | <= 3.0.0-20250225100611-da4e44b77af4 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-c3jm-gv5r-9wcp
- https://github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcp
- https://github.com/cloudreve/cloudreve/commit/f3347130ac48f2ff996af9ef66c97be2dda9cba9
- https://github.com/cloudreve/cloudreve/releases/tag/4.17.0