registry / Staged payload carrier / negotium / 0.14.1

negotium@0.14.1

Install the Negotium multi-agent runtime and CLI with one package

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The package is not proven malicious, but its postinstall hook stages externally hosted native executables that are later launched. Hash pinning and inspected secret protections lower the risk, yet do not remove the install-time native payload boundary.

Static reason

One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source

Trigger

npm installation runs postinstall; a later Negotium runtime action starts the background command service.

Impact

A release-hosted native artifact becomes executable on the host outside the normal npm tarball review boundary.

Mechanism

Postinstall native binary download followed by runtime process launch.

AI rationale

Evidence

package.jsoninstall-browser-rs.mjsinstall-bash-rs.mjsdist/hosted-agent.js.negotium/binaries/browser-rs/v0.3.2/browser-rs.negotium/binaries/bash-rs/v0.1.7/bash-rs

Network endpoints2

github.com/maestrojeong/browser-rs-mcp/releases/download/v0.3.2github.com/maestrojeong/bash-rs-mcp/releases/download/v0.1.7

Decision evidence

public snapshot

AI called this Suspicious at 84.0% confidence as Unknown with medium false-positive risk.

Evidence for warning

Installation automatically runs two downloader scripts.
The installer fetches a native executable, verifies a fixed hash, and saves it executable in the user's Negotium state directory.
The runtime can launch the installed background command service.
The package contains AI-agent and credential-handling runtime code.

Evidence against

The downloaded browser binary is checked against a hard-coded SHA-256 before installation.
The inspected credential hook blocks access to runtime secret storage and redacts output.
No self-dependency, foreign agent-configuration write, credential exfiltration endpoint, or hidden payload execution was found in the inspected sources.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

Manifest

Source & flagged code

10 flagged

package.jsonView file

•scripts.postinstall = node install-browser-rs.mjs && node install-bash-rs.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node install-browser-rs.mjs && node install-bash-rs.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/hosted-agent.jsView file

Lines 1-29javascript

1// @bun

2import {

3 __require,

4 __toESM,

5 canonicalMcpBridgeEnv,

6 revokeCanonicalMcpBridgeTurn

7} from "./chunk-s2gez3wg.js";

9// ../../packages/core/src/agents/claude-provider.ts

10import { spawn as spawn2 } from "child_process";

11import { existsSync as existsSync2, readFileSync as readFileSync3 } from "fs";

High

Child Process

Package source references child process execution.

dist/hosted-agent.jsView on unpkg · L9

12import { query } from "@anthropic-ai/claude-agent-sdk";

14// ../../packages/core/src/agents/rollout/shared.ts

15import { resolve as resolve2 } from "path";

17// ../../packages/core/src/platform/config.ts

18import { execFileSync } from "child_process";

19import { randomBytes } from "crypto";

20import {

21 accessSync,

22 chmodSync,

23 constants,

24 existsSync,

25 mkdirSync,

26 readFileSync,

27 writeFileSync

28} from "fs";

29import { createRequire } from "module";

Lines 183-223javascript

183var BROWSER_RS_BIN = resolveBrowserRsBin(envText("NEGOTIUM_BROWSER_RS_BIN"));

184var BASH_RS_VERSION = "v0.1.7";

185function resolveBashRsBin(envValue) {

186 const

dist/mcp-factories.jsView file

•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. dist/mcp-factories.js: writeFileSync writeFileSync(secretFile, `${envValue} writeFileSync(secretFile, `${secret} return process.env.NEGOTIUM_CODEX_AUTH_FILE || join(process.env.CODEX_HOME || join(homedir(), ".codex"), "auth.json"); writeFileSync as writeFileSync3 writeFileSync3(fd, payload); import { existsSync as existsSync4, readFileSync as readFileSync5, writeFileSync as writeFileSync4 } from "fs"; const projectsDir = join3(homedir2(), ".claude", "projects", encodeClaudeCwd(opts.cwd));

High

Credential Redirect Persistence

Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.

dist/mcp-factories.jsView on unpkg

dist/main.jsView file

4072}); L4073: import { spawn as spawn3 } from "child_process"; L4074: function createCodexAppServerForker(host) { ... L4076: const child = host.spawnServer(); L4077: return await new Promise((resolve6, reject) => { L4078: let settled = false; L4079: let stdoutBuffer = ""; L4080: let stderr = ""; ... L4087: try { L4088: child.stdin.end(); L4089: child.kill();

High

Command Output Exfiltration

Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.

dist/main.jsView on unpkg · L4072

dist/agent-helpers.jsView file

3308Trigger-reachable command-output exfiltration chain: manifest.exports -> dist/agent-helpers.js L3308: }); L3309: import { spawn as spawn3 } from "child_process"; L3310: function createCodexAppServerForker(host) { ... L3312: const child = host.spawnServer(); L3313: return await new Promise((resolve6, reject) => { L3314: let settled = false; L3315: let stdoutBuffer = ""; L3316: let stderr = ""; ... L3323: try { L3324: child.stdin.end(); L3325: child.kill();

High

Trigger Reachable Command Output Exfiltration

A manifest entrypoint or package-local install chain reaches command-output exfiltration behavior.

dist/agent-helpers.jsView on unpkg · L3308

dist/runtime/scripts/faster-whisper-wrapper.pyView file

•path = dist/runtime/scripts/faster-whisper-wrapper.py kind = build_helper sizeBytes = 2704 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

dist/runtime/scripts/faster-whisper-wrapper.pyView on unpkg

dist/runtime-helpers.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 3

High

Semantic Analysis Limited

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

dist/runtime-helpers.js#virtual:normalized:round1View on unpkg

dist/browser-runtime.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = negotium@0.14.0 matchedIdentity = npm:bmVnb3RpdW0:0.14.0 similarity = 0.967 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/browser-runtime.jsView on unpkg

Source & flagged code

10 flagged · loading source

package.jsonView file

•scripts.postinstall = node install-browser-rs.mjs && node install-bash-rs.mjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node install-browser-rs.mjs && node install-bash-rs.mjs

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/hosted-agent.jsView file

9// ../../packages/core/src/agents/claude-provider.ts L10: import { spawn as spawn2 } from "child_process"; L11: import { existsSync as existsSync2, readFileSync as readFileSync3 } from "fs";

High

Child Process

Package source references child process execution.

dist/hosted-agent.jsView on unpkg · L9

Findings

1 Critical7 High6 Medium4 Low

CriticalPrevious Version Dangerous Deltadist/browser-runtime.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/hosted-agent.js

HighShell

HighCredential Redirect Persistencedist/mcp-factories.js

HighCommand Output Exfiltrationdist/main.js

HighTrigger Reachable Command Output Exfiltrationdist/agent-helpers.js

HighSemantic Analysis Limiteddist/runtime-helpers.js#virtual:normalized:round1

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requiredist/hosted-agent.js

MediumNetwork

MediumEnvironment Vars

Affected versions and remediation

This report applies to negotium@0.14.1.

See all versions of negotium for other recorded verdicts.

Review the evidence and your use of negotium@0.14.1 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: 2026-09-07 13:30:20.651Z (UTC).

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