registry / Remote code execution / @metaphi-ai/hum / 0.2.57

@metaphi-ai/hum@0.2.57

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

AI Security Review

scanned 14d ago · by lpm-firewall-ai

The install hook performs package-aligned core setup, but it can execute a downloaded shell script during npm installation. This supports a warning for install-time remote execution capability, not a confirmed malicious attack.

Static reason

One or more suspicious static signals were detected.

Trigger

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

Impact

This grants a remote installer code execution during package installation, although the observed setup is aligned with the package's core installation and does not establish malicious behavior.

Mechanism

The postinstall invokes the core installer, which can run curl on the astral.sh install script and pipe its output to sh.

AI rationale

Evidence

package.jsonscripts/postinstall.jsdist/install.mjs

Network endpoints1

astral.sh/uv/install.sh

Decision evidence

public snapshot

AI called this Suspicious at 82.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package runs a postinstall script automatically.
Postinstall checks whether the matching core is installed and invokes its installer when needed.
The installer may pipe a shell script from astral.sh directly into sh.
The core package spec defaults to hum-cli at the package version, so setup appears package-aligned.

Evidence against

The inspected installer defaults to a version-matched hum-cli package and uses a named uv installer source, with no evidence here of unrelated destinations or broad consumer-project mutation.

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

Oversized source lightweight scan

Source & flagged code

9 flagged

package.jsonView file

Lines 1-13json

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

3 "version": "0.2.57",

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 = 4214104 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 = 4214104 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@0.2.57.

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

Review the evidence and your use of @metaphi-ai/hum@0.2.57 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: 2026-10-09 06:57:18.523Z (UTC).

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