registry / Remote code execution / @metaphi-ai/hum / 0.2.44

@metaphi-ai/hum@0.2.44

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

AI Security Review

scanned 14d ago · by lpm-firewall-ai

The package has an automatic install-time path to execute a script fetched from an external host without a package-side integrity check. Its purpose appears aligned with setting up Hum’s core, so the source supports a warning for remote execution risk but does not establish a concrete malicious attack.

Static reason

One or more suspicious static signals were detected.

Trigger

Installing the package through npm when its matching core version is not already installed.

Impact

The fetched script runs with the privileges of the npm installation process and can modify the user environment.

Mechanism

The postinstall calls the core installer, which invokes a shell or PowerShell command that downloads and immediately executes the uv installation script.

AI rationale

Evidence

scripts/postinstall.jsdist/install.mjs

Network endpoints1

astral.sh

Decision evidence

public snapshot

AI called this Suspicious at 88.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package runs a postinstall hook that installs its core when the matching version is absent.
On Unix, that install can download a shell script from astral.sh and execute it directly; Windows uses a PowerShell download-and-execute command.
The installer also fetches the package itself with npm scripts disabled, but that does not constrain the separate uv installer command.

Evidence against

The install work is directed at setting up Hum’s Python core, matching the package’s CLI purpose.
The source does not establish that the downloaded installer is controlled by this package or show a separate malicious payload.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemShell

Supply chain

HighEntropyStringsUrlStrings

Manifest

NoLicense

scanned 3 file(s), 274 KB of source, external domains: api.nuget.org, astral.sh, github.com, hum.metaphi.ai, react.dev

Source & flagged code

9 flagged

package.jsonView file

Lines 1-13json

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

3 "version": "0.2.44",

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/hum.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";

dist/install.mjs#virtual:normalized:round1View file

95fs.mkdirSync(path.dirname(dir), { recursive: true }); L96: const r = runImpl("powershell", ["-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", script]); L97: try {

High

Shell

Package source references shell execution.

dist/install.mjs#virtual:normalized:round1View on unpkg · L95

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/install.mjs#virtual:normalized:round1View on unpkg

bin/hum.jsView file

Lines 5-30javascript

5// it over localhost. Everything the person sees is there; everything the session records is in

6// the core. This file is what npm put on PATH and it changes only when npm reinstalls it: keep

7// it small, and keep it running whatever the versions directory holds.

8import fs from 'node:fs';

9import { fileURLToPath, pathToFileURL } from 'node:url';

10import path from

dist/cli.mjsView file

•path = dist/cli.mjs kind = oversized_source_file sizeBytes = 4207870 magicHex = [redacted]

Medium

Oversized Source File

Package contains source files above the normal full-analysis size ceiling.

dist/cli.mjsView on unpkg

•path = dist/cli.mjs kind = oversized_cli_entrypoint sizeBytes = 4207870 magicHex = [redacted]

Medium

Oversized Cli Entrypoint

Package contains an oversized executable-looking CLI entrypoint.

dist/cli.mjsView on unpkg

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

Findings

5 High6 Medium5 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/install.mjs

HighShelldist/install.mjs#virtual:normalized:round1

HighCross File Remote Execution Contextdist/install.mjs

HighSemantic Analysis Limiteddist/install.mjs#virtual:normalized:round1

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requirebin/hum.js

MediumEnvironment Vars

MediumOversized Source Filedist/cli.mjs

MediumOversized Cli Entrypointdist/cli.mjs

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

Affected versions and remediation

This report applies to @metaphi-ai/hum@0.2.44.

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

Review the evidence and your use of @metaphi-ai/hum@0.2.44 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: 2026-10-09 06:57:13.601Z (UTC).

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