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Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVE-2026-43940

High
8.4/10

Summary

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to version 3.7.16, the 'runWidget()' function in 'src/app/widgets/load-widget.js' constructs a file path by directly concatenating usersupplied widget identifiers without any sanitization. Because 'runWidget' is exposed to the renderer process via an asynchronous IPC handler with no input validation, an attacker who achieves JavaScript execution inside the renderer (for example, through a malicious plugin or a crosssite scripting flaw in the builtin webview) can abuse a Path Traversal (../) to load and execute an arbitrary JavaScript file anywhere on the victims filesystem. This gives the attacker local code execution with the full privileges of the electerm process, leading to complete system compromise. This issue has been patched in version 3.7.16.

  • LOW
  • LOCAL
  • HIGH
  • UNCHANGED
  • NONE
  • NONE
  • HIGH
  • HIGH

CWE-22 - Path Traversal

Path traversal (or directory traversal), is a vulnerability that allows malicious users to traverse the server's root directory, gaining access to arbitrary files and folders such as application code & data, back-end credentials, and sensitive operating system files. In the worst-case scenario, an attacker could potentially execute arbitrary files on the server, resulting in a denial of service attack. Such an exploit may severely impact the integrity, confidentiality, and availability of an application.

References

Advisory Timeline

  • Published