CVE-2026-43942: electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

Q: How do I fix CVE-2026-43942?

electerm: upgrade to newer than 3.8.15. Exact commands for each OS are on this page.

Q: Is CVE-2026-43942 being exploited?

CVE-2026-43942 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-43942 affect?

CVE-2026-43942 affects electerm. Severity is medium (CVSS 5.5). 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 r

Q: How urgent is CVE-2026-43942?

Priority 19/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2026-43942 is a medium-severity flaw (CVSS 5.5) affecting electerm. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 JavaSc

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-200, CWE-312
Published	2026-05-08
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: electerm project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-08 04:16 UTCPublished CVE record published
2026-06-17 10:50 UTCUpdated Record last modified

electerm project electerm UPGRADE

Affected: <= 3.8.15

Fixed in: newer than 3.8.15

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy electerm || rpm -q electerm || electerm --version

2. UPGRADE to newer than 3.8.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade electerm

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade electerm

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-43942?

electerm: upgrade to newer than 3.8.15. Exact commands for each OS are on this page.

Is CVE-2026-43942 being exploited?

CVE-2026-43942 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-43942 affect?

CVE-2026-43942 affects electerm. Severity is medium (CVSS 5.5). 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 r

How urgent is CVE-2026-43942?

Priority 19/100. No elevated risk signals yet.

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-45787 CRITICAL 9.1 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-45353 HIGH 7.8 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-43944 CRITICAL 9.6 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-43943 HIGH 7.8 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client
CVE-2026-43941 CRITICAL 9.6 UPGRADE electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client

References

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