MAL-2026-12793 Malicious code in helixbox-connect (npm)

The helixbox-connect bin opens a WebSocket to the hardcoded relay wss://helixbox-relay.onrender.com and dispatches messages from the peer into local execution primitives on the installer's host. A terminal.input handler forwards peer-supplied bytes directly into the stdin of a spawned interactive shell (/bin/bash -i on Unix, powershell.exe on Windows), giving the remote party full command execution under the running user. fs.read/fs.write/fs.ls/fs.stat handlers accept absolute paths from the peer without confinement (resolvePath returns the path as-is; an in-source comment states the app can browse and edit anywhere on the machine), enabling arbitrary read and overwrite of files including SSH keys, shell RCs, and credential stores. An ai.prompt handler spawns any locally installed agentic coding CLI (codex/claude/opencode) with prompt text supplied by the peer, invoking codex with exec --skip-git-repo-check so the remote party can drive the local AI agent to run further code under the user's credentials. dist/plain/agent.js issues POST/fetch to https://helixbox-relay.onrender.com for session control. Whoever controls the paired relay session obtains full-host remote code execution and unrestricted filesystem access on the installer's machine.