Executive Summary

CVE-2026-43942 is a vulnerability in Electerm, an open-source terminal and remote connection client. In versions 3.8.15 and earlier, the application exposes the entire environment variables (process.env) to the renderer process by serializing and sending them via the getConstants() IPC handler. This data is accessible through window.pre.env in the renderer, meaning any JavaScript running there—such as from malicious plugins or compromised webviews—can access sensitive secrets like cloud keys or API tokens.

An attacker who gains JavaScript execution in the renderer can easily steal these secrets and send them to a remote server, potentially leading to cloud account compromise, supply chain attacks, and lateral movement within networks.

At the time of publication, no public patches are available, and mitigations include avoiding sensitive environment variables when launching Electerm, clearing secrets before starting, auditing plugins, and restricting renderer capabilities.

Useful 0 Not Useful 0

Impact Analysis

This vulnerability can lead to the exposure of sensitive environment variables such as AWS keys, GitHub tokens, and API keys to attackers who gain JavaScript execution in the renderer process.

• Cloud account compromise due to stolen credentials.
• Supply chain attacks by abusing exposed secrets.
• Lateral movement within an organization's network after initial compromise.

Because the vulnerability allows exfiltration of sensitive information without user interaction and with low attack complexity, it poses a moderate risk to confidentiality.

Useful 0 Not Useful 0

Detection Guidance

This vulnerability can be detected by checking if the Electerm application exposes the entire process.env object to the renderer process. One way to verify this is by opening the Electerm application and inspecting the 'Info' modal locally, where the environment variables are visible.

Additionally, if you have access to the renderer's JavaScript console (e.g., DevTools console), you can run the following command to check if the environment variables are exposed:

• console.log(window.pre.env)

If this command outputs the environment variables, the vulnerability is present. Monitoring network traffic for suspicious exfiltration of environment variables may also help detect exploitation attempts.

Useful 0 Not Useful 0

Mitigation Strategies

Immediate mitigation steps include avoiding the use of sensitive environment variables when launching Electerm.

You can also use shell scripts to clear sensitive secrets from the environment before starting Electerm.

Auditing and disabling any unnecessary or untrusted plugins is recommended to reduce the risk of JavaScript execution within the renderer.

Furthermore, restricting renderer capabilities such as disabling remote debugging can help prevent attackers from accessing the exposed environment variables.

Useful 0 Not Useful 0

Compliance Impact

The vulnerability in Electerm exposes sensitive environment variables, including secrets such as AWS keys, GitHub tokens, or API keys, to any JavaScript running in the renderer process. This exposure can lead to unauthorized access and exfiltration of confidential information.

Such exposure of sensitive information can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of sensitive data and prevention of unauthorized disclosure.

However, the provided information does not explicitly discuss the direct impact on compliance frameworks or specific regulatory requirements.

Useful 0 Not Useful 0