cve.bz

CVE-2026-62323

6.3 mediumEPSS 0.3%

Medium (6.3). EPSS 0.3% chance of exploitation in the next 30 days. Fixed in github.com/cloudreve/Cloudreve/v4 4.0.0-20260626022433-f3347130ac48.

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.

Severity

CVSS 3.1

6.3 medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:N
EPSS
0.3% chance of exploitation in the next 30 days; higher than 23% of CVEs (scores of 2026-10-31)
CWE
CWE-863
Published
Modified
Record from
the NVD, synced

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-c3jm-gv5r-9wcpGogithub.com/cloudreve/Cloudreve/v4<4.0.0-20260626022433-f3347130ac484.0.0-20260626022433-f3347130ac48
GHSA-c3jm-gv5r-9wcpGogithub.com/cloudreve/Cloudreve/v3<=3.0.0-20250225100611-da4e44b77af4no fix published
GO-2026-6104Gogithub.com/cloudreve/Cloudreveall versionsno fix published
GO-2026-6104Gogithub.com/cloudreve/Cloudreve/v3all versionsno fix published
GO-2026-6104Gogithub.com/cloudreve/Cloudreve/v4<4.0.0-20260626022433-f3347130ac484.0.0-20260626022433-f3347130ac48

References

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