Is CVE-2026-62323 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-62323?

CVE-2026-62323 has a CVSS v3 severity of MEDIUM (6.3).

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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.