Moderate severityNVD Advisory· Published Jul 31, 2026· Updated Jul 31, 2026
Cloudreve: Unauthorized file write via WOPI view sessions whose access token secret is ignored
CVE-2026-62323
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/cloudreve/Cloudreve/v4Go | < 4.0.0-20260626022433-f3347130ac48 | 4.0.0-20260626022433-f3347130ac48 |
github.com/cloudreve/Cloudreve/v3Go | <= 3.0.0-20250225100611-da4e44b77af4 | — |
Affected products
1Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-c3jm-gv5r-9wcpghsaADVISORY
- github.com/cloudreve/cloudreve/commit/f3347130ac48f2ff996af9ef66c97be2dda9cba9ghsax_refsource_MISCWEB
- github.com/cloudreve/cloudreve/releases/tag/4.17.0mitrex_refsource_MISC
- github.com/cloudreve/cloudreve/security/advisories/GHSA-c3jm-gv5r-9wcpghsax_refsource_CONFIRMWEB
News mentions
0No linked articles in our index yet.