Cloudreve up to 4.16.0 Remote Download Workflow download urls redirect

Summaryinfo

A vulnerability was found in Cloudreve up to 4.16.0. It has been classified as problematic. Affected is the function Download of the file /api/v4/workflow/download of the component Remote Download Workflow. This manipulation of the argument urls causes redirect. The identification of this vulnerability is CVE-2026-54562. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Cloudreve up to 4.16.0. Affected by this vulnerability is the function download of the file /api/v4/workflow/download of the component Remote Download Workflow. The manipulation of the argument urls with an unknown input leads to a redirect vulnerability. The CWE definition for the vulnerability is CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. As an impact it is known to affect integrity. The summary by CVE is:

Cloudreve is a self-hosted file management and sharing system. Prior to 4.16.1, Cloudreve's remote download workflow accepts user-supplied URLs at POST /api/v4/workflow/download and passes them to the configured downloader without blocking loopback, localhost, IPv6 localhost, or redirect-to-loopback targets, allowing a non-admin user with remote download permission to fetch internal-only URLs and read the response after it is imported into the user's own files. This issue is fixed in version 4.16.1.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-54562 since 06/15/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1204.001 according to MITRE ATT&CK.

Upgrading to version 4.16.1 eliminates this vulnerability.

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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
• 4.16.0

Website

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

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