CVE-2026-43940

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.

CVSS v3 8.4 HIGH

8.4^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/electerm/electerm/releases/tag/v3.7.16	Release Notes
https://github.com/electerm/electerm/security/advisories/GHSA-f77v-9vpc-6pjm	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:electerm_project:electerm:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-08 04:16

Updated : 2026-06-17 10:50

NVD link : CVE-2026-43940

Mitre link : CVE-2026-43940

CVE.ORG link : CVE-2026-43940

JSON object : View

Products Affected

electerm_project

electerm

CWE

CWE-22

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

CWE-829

Inclusion of Functionality from Untrusted Control Sphere

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