File Management Vulnerability in Cloudreve File Sharing System
CVE-2026-55495

4.3MEDIUM

Key Information:

Vendor

Cloudreve

Status
Cloudreve
Vendor
CVE Published:
31 July 2026

What is CVE-2026-55495?

Cloudreve, a self-hosted file management and sharing system, is susceptible to a path traversal vulnerability in its WOPI PUT_RELATIVE handler. This flaw occurs prior to version 4.17.0, where the handler erroneously processes the X-WOPI-SuggestedTarget as a path rather than as a filename. This oversight enables attackers to manipulate file paths, potentially allowing them to escape the designated file directory and create or overwrite files in unauthorized locations within the same user account. The issue has been addressed in version 4.17.0.

Affected Version(s)

cloudreve < 4.17.0

References

https://github.com/cloudreve/cloudreve/security/advisorie...
x_refsource_CONFIRM
https://github.com/cloudreve/cloudreve/commit/7968e50429e...
x_refsource_MISC
https://github.com/cloudreve/cloudreve/releases/tag/4.17.0
x_refsource_MISC

CVSS V3.1

Score:
4.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.