CVE-2026-62323
Published:July 31, 2026
Updated:August 04, 2026
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
https://github.com/cloudreve/cloudreve.git (GITHUB):
Affected version(s) >=4.0.0 <4.17.0Fix Suggestion:
Update to version 4.17.0github.com/cloudreve/Cloudreve/v4 (GO):
Affected version(s) >=v4.0.0-20250424075610-d195002bf73f <v4.0.0-20260626022433-f3347130ac48Fix Suggestion:
Update to version v4.0.0-20260626022433-f3347130ac48Related Resources (6)
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Contact UsCVSS v4
Base Score:
7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Incorrect Authorization
EPSS
Base Score:
0.31