Vulnerability · Published May 8, 2026 · Assigned by GitHub_M
CVE-2026-43940electerm: Path traversal in electerm runWidget leads to arbitrary code execution
High 8.4
In plain English
A high-severity path traversal in electerm from electerm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 user‑supplied widget identifiers without any sanitisation. 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 cross‑site scripting flaw in the built‑in webview) can abuse a path traversal (../) to load and execute an arbitrary JavaScript file anywhere on the victim’s 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | electerm | 3.7.16 | GHSA-f77v-9vpc-6pjm |
Affected products (as reported)
Weakness: CWE-22, CWE-829 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/electerm/electerm/security/advisories/GHSA-f77v-9vpc-6pjm x_refsource_CONFIRM
- https://github.com/electerm/electerm/releases/tag/v3.7.16 x_refsource_MISC