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Vulnerabilities CVE-2026-62323

CVE-2026-62323

Medium
Open
TLP:CLEAR

Cloudreve: Unauthorized file write via WOPI view sessions whose access token secret is ignored

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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.

Details

CVSS Score
6.3
EPSS Score
0.31%

23.1th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N
Confidence
90%
Published
Jul 31, 2026
Last Modified
Jul 31, 2026
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