CVE-2026-43943: Electerm Security Vulnerability: RCE via malicious SSH server filename in openFileWithEdi…

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 edi…

8.8CVSS Score

HIGHSeverity

NOCISA KEV

VulnerabilityImpact Type

📋 Vulnerability Details

CVE ID	CVE-2026-43943
Vendor	npm
Affected Product	electerm
Vulnerability Type	Vulnerability
CVSS Score	8.8 (HIGH)
Actively Exploited	❌ No known exploitation
Patch Status	See Vendor Advisory →
Reported By	CYBERDUDEBIVASH SENTINEL APEX Intelligence (via github_advisories)

🔬 Technical Analysis

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.

Patches Fixed in version >= 3.7.9 - https://github.com/electerm/electerm/commit/24ce7103e264cffe6eb5476c0506a2379e6f8333 ###

🎯 Known Indicators of Compromise

{"type":"sha1","value":"24ce7103e264cffe6eb5476c0506a2379e6f8333","confidence_score":0.9,"first_seen":"2026-05-08","source_count":1} {"type":"url","value":"https://github.com/electerm/electerm/commit/24ce7103e264cffe6eb5476c0506a2379e6f8333","confidence_score":0.82,"first_seen":"2026-05-08","source_count":1}

📚 Advisory References

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