registry / Staged payload carrier / @metaphi-ai/hum / 0.1.55

@metaphi-ai/hum@0.1.55

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

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The package contains automatic remote code execution during installation and background update behavior, but this snapshot does not establish credential theft or another confirmed malicious payload. The unresolved remote payload chain warrants a warning rather than a clean result.

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

Trigger

npm postinstall or a later CLI invocation that checks for updates

Impact

A remote service or external package registry can supply code that executes with the installing user's permissions.

Mechanism

Remote shell-piped bootstrap and external engine installation

AI rationale

Evidence

package.jsonscripts/postinstall.jsdist/install.mjsdist/cli.mjs~/.hum/engine~/.hum/engine-install.json~/.hum/update.log~/.local/bin/uv

Network endpoints3

astral.sh/uv/install.ps1astral.sh/uv/install.shmetaphi.ai/hum

Decision evidence

public snapshot

AI called this Suspicious at 93.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

An npm postinstall hook automatically invokes the engine installer.
The installer downloads a remote script and pipes it into a shell or PowerShell with execution-policy bypass.
It then installs the external Python package hum-cli into the user's home directory.
The CLI also supports detached background updates that execute a remotely downloaded installer.

Evidence against

No source code in this snapshot sends browser credentials, local credentials, or harvested files to a network endpoint.
The credential file reads are limited to local diagnostic status checks.

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

11 flagged

package.jsonView file

Lines 1-13json

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

3 "version": "0.1.55",

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": ">=18" },

11 "repository": { "type": "git", "url": "git+https://github.com/metaphi-labs/hum-cli.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";

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

83456import fs4 from "node:fs"; L83457: import net from "node:net"; L83458: import os5 from "node:os"; ... L83460: import crypto from "node:crypto"; L83461: import { spawn as spawn2, spawnSync as spawnSync3 } from "node:child_process"; L83462: function uvToolDirs() { L83463: const dirs = []; L83464: if (process.env.UV_TOOL_DIR) dirs.push(process.env.UV_TOOL_DIR); L83465: 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 · L83456

32611if (filePath && origin?.line && fs.existsSync(filePath)) { L32612: const sourceCode = fs.readFileSync(filePath, "utf8"); L32613: excerpt = dist_default3(sourceCode, origin.line); ... L65850: /* metaparameters */ L65851: "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... L65852: ), ... L83192: // src/install.js L83193: import { spawnSync } from "node:child_process"; L83194: import fs2 from "node:fs";

Source & flagged code

11 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

1 Critical8 High4 Medium5 Low

CriticalBrowser Credential Phishingdist/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 Requirebin/hum.js

MediumEnvironment Vars

Affected versions and remediation

This report applies to @metaphi-ai/hum@0.1.55.

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

Review the evidence and your use of @metaphi-ai/hum@0.1.55 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: 2026-09-04 23:19:28.619Z (UTC).

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