registry / Staged payload carrier / @metaphi-ai/hum / 0.1.62

@metaphi-ai/hum@0.1.62

Hum: a self-improving coding agent for your terminal.

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The package is an automatic remote payload carrier with install-time shell execution, but the inspected source does not establish direct secret theft, destructive behavior, or foreign AI-agent control-surface mutation. This warrants a warning rather than a malware block.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review

Trigger

npm installation runs postinstall when the engine version is absent.

Impact

A registry installation can execute remotely supplied code and create or replace the engine under the user’s home directory.

Mechanism

Remote shell bootstrap followed by Python package installation.

AI rationale

Evidence

package.jsonscripts/postinstall.jsdist/install.mjs~/.hum/engine~/.hum/engine-install.json~/.local/bin

Network endpoints2

astral.sh/uv/install.ps1astral.sh/uv/install.sh

Decision evidence

public snapshot

AI called this Suspicious at 90.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

The manifest runs a postinstall script automatically.
The postinstall script invokes the engine installer when the matching engine is absent.
The installer downloads a remote shell script and executes it during installation.
It then installs an external Python package into a home-directory environment; that payload is not included in this snapshot.

Evidence against

The external engine version is pinned to this package version unless an environment override is set.
The inspected JavaScript contains no direct credential exfiltration, foreign agent-config mutation, or destructive action.
The bundled client’s shown socket traffic is limited to localhost.

Behavioral surface

Source

ChildProcessDynamicRequireEnvironmentVarsFilesystemShell

Supply chain

HighEntropyStringsUrlStrings

Manifest

NoLicense

Source & flagged code

11 flagged

package.jsonView file

Lines 1-13json

2 "name": "@metaphi-ai/hum",

3 "version": "0.1.62",

4 "description": "Hum: a self-improving coding agent for your terminal.",

5 "license": "UNLICENSED",

6 "type": "module",

7 "bin": { "hum": "bin/hum.js" },

8 "files": ["bin", "dist", "scripts"],

9 "scripts": { "postinstall": "node scripts/postinstall.js" },

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L9

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L9

10 "engines": { "node": ">=18" },

11 "repository": { "type": "git", "url": "git+https://github.com/metaphi-labs/humboldt.git" }

12}

dist/install.mjsView file

Lines 1-21javascript

1// src/install.js

2import { spawnSync } from "node:child_process";

3import fs from "node:fs";

High

Child Process

Package source references child process execution.

dist/install.mjsView on unpkg · L1

4import os from "node:os";

bin/hum.jsView file

Lines 1-10javascript

1#!/usr/bin/env node

2// `hum` from npm: the Ink front-end, which starts Hum's engine (Python, installed by postinstall

3// via uv) and talks to it over localhost. Everything the person sees is here; everything the

4// session records is in the engine.

5import { fileURLToPath, pathToFileURL } from 'node:url';

6import path from 'node:path';

7const

dist/cli.mjsView file

317"use strict"; L318: if (process.env.NODE_ENV !== "production") { L319: (function() { ... L545: isMounted: ["isMounted", "Instead, make sure to clean up subscriptions and pending requests in componentWillUnmount to prevent memory leaks."], L546: replaceState: ["replaceState", "Refactor your code to use setState instead (see https://github.com/facebook/react/issues/3236)."] L547: }; ... L2398: cwdFunction = isBrowser ? () => { L2399: throw new Error("`process.cwd()` only works in Node.js, not the browser."); L2400: } : process2.cwd; ... L2502: } L2503: const imageBuffer = Buffer.from(data); L2504: return wrapOsc(returnValue + `;size=${imageBuffer.byteLength}:` + imageBuffer.toString("base64") + BEL);

Critical

Browser Credential Phishing

Source appears to collect browser login credentials for exfiltration.

dist/cli.mjsView on unpkg · L317

83486skipVersion = (version, env3 = process.env) => writeState({ ...readState(env3), skipped: version }, env3); L83487: skipped = (version, env3 = process.env) => !!version && readState(env3).skipped === version; L83488: UPDATE_CHOICES = [ ... L83497: import fs4 from "node:fs"; L83498: import net from "node:net"; L83499: import os5 from "node:os"; ... L83501: import crypto from "node:crypto"; L83502: import { spawn as spawn2, spawnSync as spawnSync3 } from "node:child_process"; L83503: function uvToolDirs() {

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

dist/cli.mjsView on unpkg · L83486

32611if (filePath && origin?.line && fs.existsSync(filePath)) { L32612: const sourceCode = fs.readFileSync(filePath, "utf8"); L32613: excerpt = dist_default3(sourceCode, origin.line); ... L65850: /* metaparameters */ L65851: "alias audit before loglevel noop require subscribe tag owner ensure group mode name|0 changes context force incl lens load_path onlyif provider returns root show_diff type_check e... L65852: ), ... L83192: // src/install.js L83193: import { spawnSync } from "node:child_process"; L83194: import fs2 from "node:fs";

Source & flagged code

11 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node scripts/postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/install.mjsView file

1// src/install.js L2: import { spawnSync } from "node:child_process"; L3: import fs from "node:fs";

High

Child Process

Package source references child process execution.

dist/install.mjsView on unpkg · L1

Findings

1 Critical8 High4 Medium5 Low

CriticalBrowser Credential Phishingdist/cli.mjs

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/install.mjs

HighShelldist/install.mjs

HighSame File Env Network Executiondist/cli.mjs

HighRemote Agent Bridgedist/cli.mjs

HighKnown Malware Source Similaritydist/cli.mjs

HighKnown Malware Source Similaritydist/install.mjs

HighKnown Malware Source Fingerprint Signaturedist/cli.mjs

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requirebin/hum.js

MediumEnvironment Vars

Affected versions and remediation

This report applies to @metaphi-ai/hum@0.1.62.

See all versions of @metaphi-ai/hum for other recorded verdicts.

Review the evidence and your use of @metaphi-ai/hum@0.1.62 before allowing it. Restrict the permissions described in this report.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.

Evidence last updated: 2026-09-07 12:05:53.211Z (UTC).

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