CVE-2026-43942 electerm: Full process.env exposed to renderer via window.pre.env in electerm
Attackers with renderer JavaScript execution can steal environment variables, leading to credential theft and account compromise in electerm.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-43942?
CVE-2026-43942 is a medium-severity vulnerability in electerm, published on 8 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. In versions 3.8.15 and prior, the getConstants() IPC handler in src/app/lib/ipc-sync.js serialises the entire process.env object and sends it to the renderer. The data is stored as window.pre.env and is accessible from any JavaScript running in the renderer (e.g., via the DevTools console or a compromised webview context). An attacker who achieves any JavaScript execution within the renderer can trivially exfiltrate these secrets to a remote server, leading to cloud account compromise, supply chain attacks, and lateral movement. At time of publication, there are no publicly available patches.
Which versions are affected by CVE-2026-43942?
2 open source packages ship an affected version, including electerm. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electerm npm | All versions to 3.8.15 | None |
electerm npm | All versions to 3.8.15 | None |
Products include Electerm Project Electerm.
How do I fix CVE-2026-43942?
No fix has been published for CVE-2026-43942 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-43942 being exploited?
There is no known exploitation of CVE-2026-43942 in the wild and no public exploit code.
Other vulnerabilities in electerm
- CVE-2026-41500 electerm has Command Injection Vulnerability via runMac function
- CVE-2026-41501 electerm has Command Injection Vulnerability via runLinux function
- CVE-2020-23256 electerm allows unauthorized users to execute arbitrary commands
- CVE-2026-43941 Unvalidated shell.openExternal in electerm allows arbitrary protocol execution via terminal link click
- CVE-2026-43944 electerm: dangerous code can be run through links or command line
Sources
Also known as GHSA-37j4-88rp-2f6h.