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@metaphi-ai/hum@0.2.7: Malicious npm security report (Block) | LPM Firewall

registry / @metaphi-ai/hum / 0.2.7

@metaphi-ai/hum@0.2.7

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

AI Security Review

scanned 24d ago · by lpm-firewall-ai

Installing the npm package runs an unpinned remote bootstrap script and then installs a separate Python package automatically. This executes third-party code before the user invokes the CLI.

Static reason

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

Trigger

npm installation, through the postinstall lifecycle hook

Impact

A remote party controlling the bootstrap or Python package supply chain can execute code and modify the user's home directory during npm installation.

Mechanism

Remote shell bootstrap followed by automatic Python package installation

Attack narrative

The postinstall hook invokes installCore automatically. If uv is absent, installCore runs a script fetched from astral.sh through sh or PowerShell with execution-policy bypass. It then creates ~/.hum/core and uses uv pip to download and install hum-cli, importing the result to verify it. This is an automatic remote-code bootstrap at dependency-install time, with no hash or package lock for the fetched installer or Python payload.

AI rationale

This package performs unconsented install-time remote code execution through a curl-to-shell bootstrap and a second opaque package installation. That supply-chain execution path is sufficient to block publication.

Evidence

scripts/postinstall.jsdist/install.mjs~/.hum/core~/.hum/core-install.json~/.local/bin/uv

Network endpoints2

astral.sh/uv/install.ps1/uv/install.sh

Source & flagged code

9 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

88say("installing uv (it creates the Python environment for the part of hum that does the work) \u2026"); L89: const r = win ? runImpl("powershell", ["-ExecutionPolicy", "ByPass", "-c", "irm https://astral.sh/uv/install.ps1 | iex"], { stdio: "inherit" }) : runImpl("sh", ["-c", "curl -LsSf h... L90: u = r && r.status === 0 ? uv() : null;

High

Shell

Package source references shell execution.

dist/install.mjsView on unpkg · L88

•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

17// a URL, not a path: on Windows `C:\…` is not something the ESM loader will import L18: 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 · L17

dist/cli.mjsView file

485"use strict"; L486: "production" !== process.env.NODE_ENV && (function() { L487: function defineDeprecationWarning(methodName, info) { ... L624: specialPropKeyWarningShown || (specialPropKeyWarningShown = true, console.error( L625: "%s: `key` is not a prop. Trying to access it will result in `undefined` being returned. If you need to access the same value within the child component, you should pass it as a di... L626: displayName ... L1664: cwdFunction = isBrowser ? () => { L1665: throw new Error("`process.cwd()` only works in Node.js, not the browser."); L1666: } : process2.cwd; ... L1768: } L1769: const imageBuffer = Buffer.from(data); L1770: 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 · L485

88734import fs5 from "node:fs"; L88735: import net from "node:net"; L88736: import os5 from "node:os"; ... L88738: import crypto from "node:crypto"; L88739: import { spawn as spawn2, spawnSync as spawnSync3 } from "node:child_process"; L88740: function uvToolDirs() { L88741: const dirs = []; L88742: if (process.env.UV_TOOL_DIR) dirs.push(process.env.UV_TOOL_DIR); L88743: if (win3) {

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 · L88734

4648import process3 from "node:process"; L4649: import { execFileSync } from "node:child_process"; L4650: import fs from "node:fs"; ... L4705: try { L4706: const statContents = fs.readFileSync("/proc/self/stat", "utf8"); L4707: const closingParenthesisIndex = statContents.lastIndexOf(") "); ... L71088: /* metaparameters */ L71089: "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... L71090: ),

Source & flagged code

9 flagged

package.jsonView file

Lines 1-13json

1{

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

3 "version": "0.2.7",

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": ">=22" },

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

12}

13

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 1-19javascript

1#!/usr/bin/env node

2// `hum` from npm: the Ink front-end, which starts Hum's core (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 core.

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

6import path from 'node:path';

7

8

dist/cli.mjsView file

485"use strict"; L486: "production" !== process.env.NODE_ENV && (function() { L487: function defineDeprecationWarning(methodName, info) { ... L624: specialPropKeyWarningShown || (specialPropKeyWarningShown = true, console.error( L625: "%s: `key` is not a prop. Trying to access it will result in `undefined` being returned. If you need to access the same value within the child component, you should pass it as a di... L626: displayName ... L1664: cwdFunction = isBrowser ? () => { L1665: throw new Error("`process.cwd()` only works in Node.js, not the browser."); L1666: } : process2.cwd; ... L1768: } L1769: const imageBuffer = Buffer.from(data); L1770: 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 · L485

88734import fs5 from "node:fs"; L88735: import net from "node:net"; L88736: import os5 from "node:os"; ... L88738: import crypto from "node:crypto"; L88739: import { spawn as spawn2, spawnSync as spawnSync3 } from "node:child_process"; L88740: function uvToolDirs() { L88741: const dirs = []; L88742: if (process.env.UV_TOOL_DIR) dirs.push(process.env.UV_TOOL_DIR); L88743: if (win3) {

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 · L88734

4648import process3 from "node:process"; L4649: import { execFileSync } from "node:child_process"; L4650: import fs from "node:fs"; ... L4705: try { L4706: const statContents = fs.readFileSync("/proc/self/stat", "utf8"); L4707: const closingParenthesisIndex = statContents.lastIndexOf(") "); ... L71088: /* metaparameters */ L71089: "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... L71090: ),

Lines 68-108javascript

68 return true;

69}

70function installCore(version, { env = process.env, say = (m) => console.log(`hum: ${m}`), runImpl = run, now = Date.now() } = {}) {

71 const home = humHome(env);

72 const dir = coreDir(env);

73 const python = corePython(env);

74 const localBin = path.join(os.homedir(), ".local", "bin");

75 const uvNames = ["uv", path.join(localBin, win ? "uv.exe" : "uv")];

76 const uv = () => uvNames.find((u) => {

77 const r = runImpl(u, ["--version"]);

78 return r && r.status === 0;

79 });

80 const spec = env.HUM_CORE_SPEC || `hum-cli==${version}`;

81 const outcome = (ok, error = null, got = version) => {

82 writeInstallState({ version: got, wanted: version, ok, error, at: now }, env);

83 return { ok, version: got, error };

84 };

85 try {

86 let u = uv();

87 if (!u) {

88 say("installing uv (it creates the Python environment for the part of hum that does the work) \u2026");

89 const r = win ? runImpl("powershell", ["-ExecutionPolicy", "ByPass", "-c", "irm https://astral.sh/uv/install.ps1 | iex"], { stdio: "inherit" }) : runImpl("sh", ["-c", "curl -LsSf https://astral.sh/uv/install.sh | sh"], { stdio: "inherit"

90 u = r && r.status === 0 ? uv() : null;

High

Shell

Package source references shell execution.

dist/install.mjsView on unpkg · L88

91 if (!u) return outcome(false, `could not install uv; install it from https://astral.sh/uv and run: ${npmFix(version)}`);

92 }

93 say(`installing ${env.HUM_CORE_SPEC ? spec : `hum ${version}`} into ${dir} \u2026`);

94 fs.mkdirSync(home, { recursive: true });

95 try {

96 fs.unlinkSync(stampPath(env));

97 } catch {

98 }

99 const trusted = trustedPython(env, runImpl);

100 const makeVenv = (clear) => (runImpl(u, ["venv", "--quiet", "--python", trusted || "3.12", ...clear ? ["--clear"] : [], dir], { stdio: "inherit" }) || {}).status

101 const pipIn = () => (runImpl(u, ["pip", "install", "--quiet", "--python", python, spec], { stdio: "inherit" }) || {}).status === 0;

102 if (!fs.existsSync(python) && !makeVenv(fs.existsSync(dir))) return outcome(false, "uv venv failed");

103 if (!pipIn()) return outcome(false, `uv pip install ${spec} failed`);

104 let got = importedVersion(env, runImpl);

105 if (!got) return outcome(false, "hum did not import after the install");

106 if (got !== version && !env.HUM_CORE_SPEC) return outcome(false, `installed ${got}, wanted ${version}`, got);

107 let blocked = sslBlocked(env, runImpl);

108 if (blocked && trusted) {