registry / Install hook abuse / @metaphi-ai/hum / 0.1.57

@metaphi-ai/hum@0.1.57

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

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

The package has an automatic install hook that executes remote code and installs an external runtime, creating a material opaque supply-chain risk. Static inspection did not establish direct credential theft, persistence beyond its own directory, or a confirmed malicious payload.

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; previous stored version diff introduced dangerous source

Trigger

Installing the npm package when the matching engine is not already present.

Impact

Remote installer or Python package content can execute with the installing user's privileges.

Mechanism

Postinstall downloads and executes an installer, then runs a remote 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 91.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

The package runs scripts/postinstall.js automatically after npm installation.
The postinstall path downloads and executes Astral's installer through a shell or PowerShell pipeline.
It then creates a home-directory virtual environment and installs the remote Python package hum-cli.
The installed engine specification can be overridden through HUM_ENGINE_SPEC.

Evidence against

The inspected JavaScript contains no confirmed browser credential harvesting or exfiltration.
The installer pins hum-cli to the npm package version unless the environment override is set.
Writes observed in the installer are limited to the package-owned ~/.hum area.

Behavioral surface

Source

ChildProcessDynamicRequireEnvironmentVarsFilesystemShell

Supply chain

HighEntropyStringsUrlStrings

Manifest

NoLicense

scanned 3 file(s), 264 KB of source, external domains: astral.sh, github.com, reactjs.org

Source & flagged code

12 flagged

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

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";

5import path from "node:path";

6var win = process.platform === "win32";

7var npmFix = (version = "") => `npm i -g @metaphi-ai/hum@${version || "latest"} --foreground-scripts`;

8var NPM_FIX = npmFix("latest");

9var humHome = (env = process.env) => env.HUM_HOME || path.join(os.homedir(), ".hum");

10var engineDir = (env = process.env) => path.join(humHome(env), "engine");

11var enginePython = (env = process.env) => win ? path.join(engineDir(env), "Scripts", "python.exe") : path.join(engineDir(env), "bin", "python");

12var stampPath = (env) => path.join(engineDir(env), "version");

13var statePath = (env) => path.join(humHome(env), "engine-install.json");

14var run = (cmd, args, opts = {}) => spawnSync(cmd, args, { encoding: "utf8", windowsHide: true, ...opts });

15var ASK_VERSION = ["-I", "-c", "import hum; print(hum.__version__)"];

16function importedVersion(env = process.env, runImpl = run) {

17 const r = runImpl(enginePython(env), ASK_VERSION);

18 return r && r.status === 0 ? String(r.stdout).trim() : null;

19}

20function installedVersion(env = process.env, runImpl = run) {

21 try {

Lines 68-108javascript

68 return true;

69}

70function installEngine(version, { env = process.env, say = (m) => console.log(`hum: ${m}`),

•matchType = normalized_sha256 matchedPackage = @metaphi-ai/hum@0.1.61 matchedPath = dist/install.mjs matchedIdentity = npm:QG1ldGFwaGktYWkvaHVt:0.1.61 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/install.mjsView on unpkg

bin/hum.jsView file

8// a URL, not a path: on Windows `C:\…` is not something the ESM loader will import L9: await import(pathToFileURL(path.join(here, '..', 'dist', 'cli.mjs')).href);

Medium

Dynamic Require

Package source references dynamic require/import behavior.

bin/hum.jsView on unpkg · L8

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

•matchType = previous_version_dangerous_delta matchedPackage = @metaphi-ai/hum@0.2.4 matchedIdentity = npm:QG1ldGFwaGktYWkvaHVt:0.2.4 similarity = 0.500 summary = stored previous version shares package body but lacks this dangerous source file

Critical

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

dist/cli.mjsView on unpkg

83458import fs4 from "node:fs"; L83459: import net from "node:net"; L83460: import os5 from "node:os"; ... L83462: import crypto from "node:crypto"; L83463: import { spawn as spawn2, spawnSync as spawnSync3 } from "node:child_process"; L83464: function uvToolDirs() { L83465: const dirs = []; L83466: if (process.env.UV_TOOL_DIR) dirs.push(process.env.UV_TOOL_DIR); L83467: if (win3) {

Source & flagged code

12 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

2 Critical8 High4 Medium5 Low

CriticalBrowser Credential Phishingdist/cli.mjs

CriticalPrevious Version Dangerous Deltadist/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 Require

Affected versions and remediation

This report applies to @metaphi-ai/hum@0.1.57.

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

Review the evidence and your use of @metaphi-ai/hum@0.1.57 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: 2026-09-13 14:01:27.225Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.