Cloudreve up to 4.16.x User Search /api/v4/user/search SearchActive information disclosure

Summaryinfo

A vulnerability categorized as problematic has been discovered in Cloudreve up to 4.16.x. Impacted is the function SearchActive of the file /api/v4/user/search of the component User Search. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2026-55496. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Cloudreve up to 4.16.x. This vulnerability affects the function SearchActive of the file /api/v4/user/search of the component User Search. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Cloudreve is a self-hosted file management and sharing system. Prior to 4.17.0, GET /api/v4/user/search calls SearchActive without adding a StatusActive predicate and serializes matches at RedactLevelUser, allowing any logged-in user to enumerate email addresses and profile metadata for inactive or banned accounts. The service calls userClient.SearchActive, but despite its name that method filters only by email/nickname keyword and never adds a StatusActive predicate — while the sibling lookups GetActiveByID and GetActiveByDavAccount, defined a few lines above it, do. Search hits are serialized at RedactLevelUser, which includes the email address. This issue is fixed in version 4.17.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-55496 since 06/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 4.17.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Cloud Software

Name

• Cloudreve

Version

• 4.0
• 4.1
• 4.2
• 4.3
• 4.4
• 4.5
• 4.6
• 4.7
• 4.8
• 4.9
• 4.10
• 4.11
• 4.12
• 4.13
• 4.14
• 4.15
• 4.16

Website

• Product: https://github.com/cloudreve/cloudreve/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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