TI-2026-31998 Aliases CVE-2026-43941 GHSA-fwf6-j56g-m97c

Unvalidated shell.openExternal in electerm allows arbitrary protocol execution via terminal link click

MEDIUM 43CWE-601Published 2026-05-08 · Updated 2026-05-08

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Spoofing, Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-601 and CWE-88.

Summary

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, Electerm's terminal hyperlink handler passes any URL clicked in the terminal directly to shell.openExternal without any protocol validation. An attacker who controls terminal output (e.g., via a malicious SSH server, compromised remote host, or malicious plugin rendering terminal content) can thus achieve arbitrary code execution or local file access on the victim's machine, requiring only that the victim clicks a displayed link. At time of publication, there are no publicly available patches.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00394 33rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
electerm	electerm	up to 3.8.15	—	No fix listed	CNA
—	electerm (npm)	up to 3.8.15	—	No fix listed	GHSA-fwf6-j56g-m97c

electerm Vendorelecterm Affected up to 3.8.15 Fixed in — No fix listed CNA
electerm (npm) Vendor— Affected up to 3.8.15 Fixed in — No fix listed GHSA-fwf6-j56g-m97c

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:electerm_project:electerm::::::::	up to 3.8.15	Vulnerable	electerm

cpe:2.3:a:electerm_project:electerm:*:*:*:*:*:*:*:* Versions up to 3.8.15 Vulnerable ·electerm

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-43941
2026-10-03 Alias added: GHSA-fwf6-j56g-m97c

References

Advisory 2

Other 1

https://github.com/electerm/electerm

TI-2020-14501 An issue was discovered in Electerm 1.3.22, allows attackers to execute arbitrary code… CVSS 3.1CRITICAL 9.8
TI-2026-30086 electerm has Command Injection Vulnerability via runMac function CVSS 3.1CRITICAL 9.8
TI-2026-30087 electerm has Command Injection Vulnerability via runLinux function CVSS 3.1CRITICAL 9.8
TI-2026-32001 electerm: dangerous code can be run through links or command line CVSS 4.0CRITICAL 9.4
TI-2026-33147 electerm: Local code through electerm's single-instance socket CVSS 4.0CRITICAL 9.3
TI-2026-31997 electerm: Path traversal in electerm runWidget leads to arbitrary code execution CVSS 3.1HIGH 8.4

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences