charmbracelet wish up to 2.0.0 SCP Middleware charm.land/wish/v2 path traversal

Summaryinfo

A vulnerability was found in charmbracelet wish up to 2.0.0. It has been classified as critical. The impacted element is an unknown function of the file charm.land/wish/v2 of the component SCP Middleware. Performing a manipulation results in path traversal. This vulnerability was named CVE-2026-41589. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in charmbracelet wish up to 2.0.0. This affects an unknown code block of the file charm.land/wish/v2 of the component SCP Middleware. The manipulation 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:

Wish is an SSH server with defaults and a collection of middlewares. From version 2.0.0 to before version 2.0.1, the SCP middleware in charm.land/wish/v2 is vulnerable to path traversal attacks. A malicious SCP client can read arbitrary files from the server, write arbitrary files to the server, and create directories outside the configured root directory by sending crafted filenames containing ../ sequences over the SCP protocol. This issue has been patched in version 2.0.1.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-41589 since 04/21/2026. 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 2.0.1 eliminates this vulnerability. The upgrade is hosted for download at github.com.

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Productinfo

Vendor

• charmbracelet

Name

• wish

Version

• 2.0

Website

• Product: https://github.com/charmbracelet/wish/

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