CVE-2026-55495

Description

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, the WOPI PUT_RELATIVE handler passes X-WOPI-SuggestedTarget to URI.JoinRaw as a path rather than a filename, allowing slash and dot-dot segments to escape the source file directory and create or conditionally overwrite files elsewhere in the same owner account. This issue is fixed in version 4.17.0.

CVSS Vector

References

• https://github.com/cloudreve/cloudreve/commit/7968e50429efab40ffa8f57fecdfbd5a73d23630
• https://github.com/cloudreve/cloudreve/releases/tag/4.17.0
• https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737
• https://github.com/cloudreve/cloudreve/security/advisories/GHSA-49h3-cwhj-4737