What is CVE-2026-43940?

CVE-2026-43940 is a high-severity vulnerability in Electerm, classified under Path Traversal. CVSS score: 8.4/10. Published 2026-05-08.

How severe is CVE-2026-43940?

High severity. CVSS v3 base score is 8.4 out of 10.

Path Traversal in Electerm

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 widg…

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.000 (13.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Electerm — versions < 3.7.16
Electerm_project Electerm

Weakness classification (CWE)

References

https://github.com/electerm/electerm/security/advisories/GHSA-f77v-9vpc-6pjm (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
https://github.com/electerm/electerm/releases/tag/v3.7.16 (x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-43940?: CVE-2026-43940 is a high-severity vulnerability in Electerm, classified under Path Traversal. CVSS score: 8.4/10. Published 2026-05-08.
How severe is CVE-2026-43940?: High severity. CVSS v3 base score is 8.4 out of 10.