rclone up to 1.75.0 Archive ZIP Backend zip.go readZip path traversal

Summaryinfo

A vulnerability classified as problematic was found in rclone. The affected element is the function readZip of the file backend/archive/zip/zip.go of the component Archive ZIP Backend. Such manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-88014. The attack can be launched remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in rclone. Affected by this issue is the function readZip of the file backend/archive/zip/zip.go of the component Archive ZIP Backend. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity, and availability. CVE summarizes:

rclone is a command-line program to sync files and directories to and from different cloud storage providers. From 1.72.0 until 1.75.1, the archive ZIP backend method (*Fs).readZip in backend/archive/zip/zip.go accepts archive/zip.File.Name values from an untrusted central directory and exposes cleaned entry names without ensuring that they remain inside the archive namespace. Entries such as ../../etc/cron.d/evil can survive path.Clean and become Object.Remote() values that fs/sync and fs/operations use as destination-relative paths, allowing rclone copy or sync to write outside the selected destination on backends that do not independently confine the path. The non-empty root check also used strings.HasPrefix without a path boundary, so root foo could incorrectly include sibling foobar entries. This issue is fixed in version 1.75.1.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-88014 since 09/09/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 1.75.1 eliminates this vulnerability.

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Productinfo

Name

• rclone

Version

• 1.42
• 1.53.3
• 1.68.2
• 1.73.5
• 1.74.3
• 1.74.4
• 1.75.0

Website

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

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