CVE-2026-73223: electerm: Path traversal in editWithSystemEditor temp file path via unsanitized SFTP filename

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-11 · updated 2026-09-09
Weakness: CWE-22

Description

electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.15.120, electerm allows a malicious SFTP server to write attacker-controlled content outside the temporary directory because the server-controlled filename name used by editWithSystemEditor in src/client/components/sftp/file-item.jsx is interpolated into path.resolve without sanitization. This issue is fixed in version 3.15.120.

Affected products

electerm: before 3.15.120

References

https://github.com/electerm/electerm/commit/32ea29365762b3451b1f2fcc0ef78104384db282
https://github.com/electerm/electerm/releases/tag/v3.15.120
https://github.com/electerm/electerm/security/advisories/GHSA-4cgc-4vgf-q55c

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