User Enumeration Vulnerability in Cloudreve File Management System
CVE-2026-55496

4.3MEDIUM

Key Information:

Vendor

Cloudreve

Status
Cloudreve
Vendor
CVE Published:
31 July 2026

What is CVE-2026-55496?

A significant vulnerability has been identified in the Cloudreve file management and sharing system prior to version 4.17.0. This flaw allows logged-in users to exploit the /api/v4/user/search endpoint, specifically the SearchActive function, which improperly handles user status predicates. As a result, users are able to enumerate the email addresses and metadata of inactive or banned accounts due to inadequate filtering. The SearchActive method lacks the StatusActive predicate required to restrict results, thus exposing sensitive information. This vulnerability has been addressed in version 4.17.0.

Affected Version(s)

cloudreve 4.17.0

References

https://github.com/cloudreve/cloudreve/security/advisorie...
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https://github.com/cloudreve/cloudreve/commit/7e1289d5527...
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https://github.com/cloudreve/cloudreve/releases/tag/4.17.0
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CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.