En bref
- CVE-2026-43943 est une vulnérabilité ÉLEVÉE (CVSS 7.8) touchant electerm (electerm project), electerm.
- Probabilité d'exploitation dans les 30 prochains jours (EPSS) : 0.17%, plus élevée que 5.7% des vulnérabilités.
- Correctif : mettre à jour vers 3.7.9 ou plus récent.
| Package | Affected versions | Patched versions |
|---|
| electerm | < 3.7.9
| 3.7.9
|
| electerm npm | < 3.7.9
| 3.7.9
|
Description
Impact
A code execution (RCE) vulnerability exists in electerm's SFTP open with system editor or "Edit with custom editor" feature. When a user opts to edit a file using open with system editor or open with a custom editor, the filename is passed directly into a command line without sanitization.
A malicious actor controlling the SSH server or user OS can exploit this by crafting a filename containing shell metacharacters. If a victim subsequently attempts to edit this file, the injected commands are executed on their machine with the user's privileges. This could allow the attacker to run arbitrary code, install malware, or move laterally within the network.
<img width="1792" height="817" alt="1" src="https://github.com/user-attachments/assets/ddf78890-e95d-4fe7-981e-f86887677e8b" />
<img width="1648" height="941" alt="2" src="https://github.com/user-attachments/assets/cca2295b-2053-4d99-a464-be51eac2f5be" />
Patches
Fixed in version >= 3.7.9
Workarounds
Until a patch is available, it is strongly recommended to:
- Refrain from using the open with system editor or "Edit with custom editor" feature when connected to untrusted or unfamiliar SSH servers.
- Consider using the built-in editor for viewing files, as this path may not be vulnerable to the same injection.
- If the feature must be used, ensure connections are exclusively established with trusted servers and perform rigorous filename validation before editing.
Resources
NVD description
electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to version 3.7.9, a code execution (RCE) vulnerability exists in electerm's SFTP open with system editor or "Edit with custom editor" feature. When a user opts to edit a file using open with system editor or open with a custom editor, the filename is passed directly into a command line without sanitization. A malicious actor controlling the SSH server or user OS can exploit this by crafting a filename containing shell metacharacters. If a victim subsequently attempts to edit this file, the injected commands are executed on their machine with the user's privileges. This could allow the attacker to run arbitrary code, install malware, or move laterally within the network. This issue has been patched in version 3.7.9.
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