Vulnerability Description
electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.11.11, electerm constructs operating system commands in src/app/lib/fs.js by interpolating untrusted file paths into the rmrf(), mv(), and cp() functions. A malicious SSH or SFTP server can provide a filename containing quote characters and shell metacharacters, and a victim can cause that filename to reach the affected operation during remote-to-local transfer, conflict renaming, copying, moving, or removal. The generated `rm -rf`, mv, `cp -r`, PowerShell Remove-Item, Move-Item, or Copy-Item command can then interpret the filename as shell syntax. This allows arbitrary command execution with the electerm desktop user's privileges on POSIX and Windows systems, enabling data exfiltration, file modification, malware installation, or denial of service. This issue is fixed in version 3.11.11.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/electerm/electerm/commit/aa778818843b9c083bd711cd04644d102fcb
- https://github.com/electerm/electerm/releases/tag/v3.11.11
- https://github.com/electerm/electerm/security/advisories/GHSA-v5ff-xmfp-p245
FAQ
What is CVE-2026-49255?
CVE-2026-49255 is a vulnerability with a CVSS score of 8.8 (HIGH). electerm is an open-sourced terminal/ssh/sftp/telnet/serialport/RDP/VNC/Spice/ftp client. Prior to 3.11.11, electerm constructs operating system commands in src/app/lib/fs.js by interpolating untruste...
How severe is CVE-2026-49255?
CVE-2026-49255 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-49255?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.