Vulnerability · Published May 8, 2026 · Assigned by GitHub_M
CVE-2026-43943electerm: RCE via malicious SSH server filename in openFileWithEditor
High 7.8
In plain English
A high-severity OS command injection in electerm from electerm. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | electerm | 3.7.9 | GHSA-q4p8-8j9m-8hxj |
Affected products (as reported)
Weakness: CWE-78, CWE-88 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://github.com/electerm/electerm/security/advisories/GHSA-q4p8-8j9m-8hxj x_refsource_CONFIRM
- https://github.com/electerm/electerm/commit/24ce7103e264cffe6eb5476c0506a2379e6f8333 x_refsource_MISC
- https://github.com/electerm/electerm/releases/tag/v3.7.9 x_refsource_MISC