CVE-2026-62323

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (3)

Core 3

Scores

CVSS v3 6.3
EPSS 0.0031
EPSS Percentile 22.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-863
Status published
Products (1)
cloudreve/cloudreve < 4.17.0
Published Jul 31, 2026
Tracked Since Jul 31, 2026