Electerm up to 3.15.119 SFTP file-item.jsx editWithSystemEditor Name path traversal

Summaryinfo

A vulnerability was found in Electerm up to 3.15.119. It has been classified as critical. This impacts the function editWithSystemEditor of the file src/client/components/sftp/file-item.jsx of the component SFTP Handler. The manipulation of the argument Name leads to path traversal. This vulnerability is listed as CVE-2026-73223. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Electerm up to 3.15.119 and classified as critical. This issue affects the function editWithSystemEditor of the file src/client/components/sftp/file-item.jsx of the component SFTP Handler. The manipulation of the argument name 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 confidentiality, integrity, and availability. The summary by CVE is:

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.15.120, electerm allows a malicious SFTP server to write attacker-controlled content outside the temporary directory because the server-controlled filename name used by editWithSystemEditor in src/client/components/sftp/file-item.jsx is interpolated into path.resolve without sanitization. This issue is fixed in version 3.15.120.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-73223 since 08/11/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 T1006 according to MITRE ATT&CK.

Upgrading to version 3.15.120 eliminates this vulnerability.

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Productinfo

Name

• Electerm

Version

• 3.15.119

Website

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

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