CVE-2026-43941: electerm Argument Injection — Fix

Description

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.

Is your site exposed to CVE-2026-43941?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

9.6

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0002

Probability of exploitation

0.06%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-88 CWE-88

CWE-601 CWE-601

Affected Products

Vendor	Product	Versions
electerm_project	electerm	< 3.8.15

References

Advisories & Patches

https://github.com/electerm/electerm/security/advisories/GHSA-fwf6-j56g-m97c

Frequently Asked Questions

What is CVE-2026-43941? +

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. It has a CVSS v3.1 base score of 9.6 (CRITICAL).

How severe is CVE-2026-43941? +

CVE-2026-43941 has a CVSS v3.1 score of 9.6 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0002, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-43941? +

CVE-2026-43941 affects products from electerm_project, specifically: electerm. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-43941? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-7865

A hidden console command is vulnerable to command injection flaw when control characters are passed to its second argument. A …

CVE-2026-49987

Repomix is a tool that packs repositories into AI-friendly files. Prior to 1.14.1, src/core/git/gitCommand.ts execGitShallowClone passes the --remote-branch value directly …

CVE-2025-49008

Atheos is a self-hosted browser-based cloud integrated development environment. Prior to version 6.0.4, improper use of `escapeshellcmd()` in `/components/codegit/traits/execute.php` allows …

CVE-2025-48385

Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations …

CVE-2025-47421

Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') vulnerability in CRESTRON TOUCHSCREENS x70 allows Argument Injection.This issue affects …

CVE-2024-47611

XZ Utils provide a general-purpose data-compression library plus command-line tools. When built for native Windows (MinGW-w64 or MSVC), the command …

CVE-2026-43941