registry / Install hook abuse / @metaphi-ai/hum / 0.1.74

@metaphi-ai/hum@0.1.74

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

AI Security Review

scanned 1mo ago · by lpm-firewall-ai

The automatic remote bootstrap and secondary package install are risky and insufficiently contained for a clean verdict. The source does not meet the stated threshold for malicious classification because no concrete theft, broad AI-agent control-surface mutation, or lifecycle self-dependency chain was found.

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

npm installation runs the postinstall hook when the bundled engine version is absent.

Impact

Remote installer and Python package code can execute and create state under the user's home directory.

Mechanism

Postinstall shell bootstrap and external 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 package runs a postinstall hook automatically during npm installation.
That hook invokes an installer that downloads and executes uv's shell or PowerShell installer.
The installer creates a home-directory environment and installs the external hum-cli Python package into it.
It accepts an environment override for the Python package specification, widening the install-time payload source.

Evidence against

No package source reads browser credentials, SSH keys, npm credentials, or environment secrets for transmission.
The inspected JavaScript network connection is limited to localhost engine communication; no credential-exfiltration endpoint was found.
No self-dependency on @metaphi-ai/hum or AI-agent configuration mutation was found in package.json or the installer.

Behavioral surface

Source

ChildProcessDynamicRequireEnvironmentVarsFilesystemShell

Supply chain

HighEntropyStrings

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

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@0.1.84 matchedPath = dist/install.mjs matchedIdentity = npm:QG1ldGFwaGktYWkvaHVt:0.1.84 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@0.2.0 matchedIdentity = npm:QG1ldGFwaGktYWkvaHVt:0.2.0 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

83488import fs4 from "node:fs"; L83489: import net from "node:net"; L83490: import os5 from "node:os"; ... L83492: import crypto from "node:crypto"; L83493: import { spawn as spawn2, spawnSync as spawnSync3 } from "node:child_process"; L83494: function uvToolDirs() { L83495: const dirs = []; L83496: if (process.env.UV_TOOL_DIR) dirs.push(process.env.UV_TOOL_DIR); L83497: 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@0.1.74.

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

Review the evidence and your use of @metaphi-ai/hum@0.1.74 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: 2026-09-12 17:58:30.280Z (UTC).

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