Cloudreve up to 4.16.0 WebDav pkg/webdav/webdav.go %2e path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in Cloudreve up to 4.16.0. The affected element is an unknown function of the file pkg/webdav/webdav.go of the component WebDav. Performing a manipulation of the argument %2e results in path traversal. This vulnerability is known as CVE-2026-54563. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability was found in Cloudreve up to 4.16.0. It has been classified as critical. This affects an unknown functionality of the file pkg/webdav/webdav.go of the component WebDav. The manipulation of the argument %2e with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Cloudreve is a self-hosted file management and sharing system. Prior to 4.16.1, a Cloudreve WebDAV account rooted at a configured folder can send paths such as /dav/%2e%2e/outside.txt because stripPrefix in pkg/webdav/webdav.go joins the decoded request suffix to the account root with fs.URI.JoinRaw without checking containment, allowing the scoped credential to read and list files outside the configured folder and writable credentials to create, overwrite, move, or delete them. This issue is reported as fixed in version 4.16.1.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-54563 since 06/15/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1006 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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