registry / Install hook abuse / negotium / 0.10.1

negotium@0.10.1

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

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The package has a risky automatic native-binary installation path, but source inspection does not establish concrete malicious behavior. Treat it as an install-hook supply-chain risk rather than confirmed malware.

Static reason

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

Trigger

npm postinstall during package installation

Impact

A package installation can place executable binaries in the user's home-state directory.

Mechanism

automatic download and installation of executable native binaries

AI rationale

Evidence

package.jsoninstall-browser-rs.mjsinstall-bash-rs.mjs.negotium/binaries/browser-rs/v0.2.1/browser-rs.negotium/binaries/bash-rs/v0.1.7/bash-rs

Network endpoints2

github.com/maestrojeong/browser-rs-mcp/releases/download/v0.2.1github.com/maestrojeong/bash-rs-mcp/releases/download/v0.1.7

Decision evidence

public snapshot

AI called this Suspicious at 81.0% confidence as Dangerous Capability with low false-positive risk.

Evidence for warning

The install lifecycle automatically runs two downloader scripts.
The browser downloader fetches a platform binary and writes it executable under the user's Negotium state directory.
The bash downloader likewise fetches and installs an executable binary during package installation.

Evidence against

Both downloaders restrict supported platform assets and compare a SHA-256 digest before installation.
The inspected flagged runtime files did not confirm the claimed fixed credential-redirection endpoint or command-output exfiltration.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 268 file(s), 6.06 MB of source, external domains: 127.0.0.1, api.deepseek.com, github.com, www.w3.org

Source & flagged code

10 flagged

package.jsonView file

Lines 123-163json

123 ],

124 "engines": {

125 "bun": ">=1.2.15"

126 },

127 "repository": {

128 "type": "git",

129 "url": "git+https://github.com/maestrojeong/negotium.git",

130 "directory": "apps/negotium"

131 },

132 "homepage": "https://github.com/maestrojeong/negotium#readme",

133 "bugs": {

134 "url": "https://github.com/maestrojeong/negotium/issues"

135 },

136 "publishConfig": {

137 "access": "public"

138 },

139 "scripts": {

140 "build": "bun ../../scripts/build-negotium-package.ts",

141 "check": "bunx tsc --noEmit",

142 "lint": "biome check",

143 "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 · L143

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L143

144 "prepack": "bun run build"

145 },

146 "dependencies": {

147 "@anthropic-ai/claude-agent-sdk": "^0.3.251",

148 "@anthropic-ai/sdk": "^0.122.0",

149 "@modelcontextprotocol/sdk": "^1.30.0",

150 "@openai/codex-sdk": "^0.151.0",

151 "diff": "^9.0.0",

152 "maestro-agent-sdk": "0.5.0",

153 "node-telegram-bot-api": "^1.1.2",

154 "orchgraph": "0.2.1",

155 "pino": "^10.3.1",

156 "pino-pretty": "^13.1.3",

157 "tsx": "^4.22.4",

158 "zod": "^4.3.6"

159 },

160 "devDependencies": {

161 "@types/node": "^20",

162 "bun-types": "^1.3.11",

163 "typescript": "^5"

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

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

3950}); L3951: import { spawn as spawn3 } from "child_process"; L3952: function createCodexAppServerForker(host) { ... L3954: const child = host.spawnServer(); L3955: return await new Promise((resolve6, reject) => { L3956: let settled = false; L3957: let stdoutBuffer = ""; L3958: let stderr = ""; ... L3965: try { L3966: child.stdin.end(); L3967: 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 · L3950

dist/agent-helpers.jsView file

3237Trigger-reachable command-output exfiltration chain: manifest.exports -> dist/agent-helpers.js L3237: }); L3238: import { spawn as spawn3 } from "child_process"; L3239: function createCodexAppServerForker(host) { ... L3241: const child = host.spawnServer(); L3242: return await new Promise((resolve6, reject) => { L3243: let settled = false; L3244: let stdoutBuffer = ""; L3245: let stderr = ""; ... L3252: try { L3253: child.stdin.end(); L3254: 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 · L3237

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/registry.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = negotium@0.10.0 matchedIdentity = npm:bmVnb3RpdW0:0.10.0 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/registry.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/registry.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@0.10.1.

See all versions of negotium for other recorded verdicts.

Review the evidence and your use of negotium@0.10.1 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: 2026-09-01 16:40:23.452Z (UTC).

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