registry / Staged payload carrier / negotium / 0.2.20

negotium@0.2.20

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

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The install-time remote native payload is a real supply-chain attack surface and warrants a warning. Pinned integrity checks and the absence of a concrete malicious behavior rule out a block.

Static reason

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

Trigger

npm postinstall; later Negotium browser/background-shell use

Impact

A compromised or incorrectly trusted pinned release binary would run with the installing user's privileges.

Mechanism

verified remote binary download and execution

AI rationale

The install-time remote native payload is a real supply-chain attack surface and warrants a warning. Pinned integrity checks and the absence of a concrete malicious behavior rule out a block.

Evidence

package.jsoninstall-browser-rs.mjsinstall-bash-rs.mjsdist/main.jsREADME.md~/.negotium/binaries/browser-rs/v0.1.19/browser-rs~/.negotium/binaries/bash-rs/v0.1.5/bash-rs

Network endpoints2

github.com/maestrojeong/browser-rs-mcp/releases/download/v0.1.19github.com/maestrojeong/bash-rs-mcp/releases/download/v0.1.5

Decision evidence

public snapshot

AI called this Suspicious at 88.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

package.json runs postinstall downloaders.
Both install scripts fetch and chmod native executables.
Downloaded binaries execute later as browser/bash runtime helpers.

Evidence against

Downloads use fixed GitHub URLs and pinned SHA-256 checks.
Installers only write under configured ~/.negotium state.
No source evidence of credential exfiltration or foreign agent-config mutation.
README describes this as a multi-agent CLI with browser/terminal adapters.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 252 file(s), 5.55 MB of source, external domains: 127.0.0.1, api.deepseek.com, github.com

Source & flagged code

9 flagged

package.jsonView file

Lines 113-153json

113 ],

114 "engines": {

115 "bun": ">=1.2.15"

116 },

117 "repository": {

118 "type": "git",

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

120 "directory": "apps/negotium"

121 },

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

123 "bugs": {

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

125 },

126 "publishConfig": {

127 "access": "public"

128 },

129 "scripts": {

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

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

132 "lint": "biome check",

133 "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 · L133

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg · L133

134 "prepack": "bun run build"

135 },

136 "dependencies": {

137 "@anthropic-ai/claude-agent-sdk": "^0.3.220",

138 "@anthropic-ai/sdk": "^0.111.0",

139 "@modelcontextprotocol/sdk": "^1.29.0",

140 "@openai/codex-sdk": "0.146.0",

141 "diff": "^9.0.0",

142 "maestro-agent-sdk": "0.2.3",

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

144 "orchgraph": "0.2.0",

145 "pino": "^10.3.1",

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

147 "tsx": "^4.22.4",

148 "zod": "^4.3.6"

149 },

150 "devDependencies": {

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

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

153 "typescript": "^5"

dist/hosted-agent.jsView file

Lines 1-28javascript

1// @bun

2import {

3 __require,

4 canonicalMcpBridgeEnv,

5 revokeCanonicalMcpBridgeTurn

6} from "./chunk-r0xs3t81.js";

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

9import { spawn as spawn2 }

dist/main.jsView file

1932async function bootstrapCodexModelCache(codexHome, cachePath) { L1933: const child = spawn(process.execPath, [codexCliScriptPath(), "app-server", "--stdio"], { L1934: env: { ...process.env, CODEX_HOME: codexHome }, L1935: stdio: ["pipe", "pipe", "pipe"] L1936: }); L1937: await new Promise((resolve4, reject) => { L1938: let settled = false;

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/main.jsView on unpkg · L1932

1932async function bootstrapCodexModelCache(codexHome, cachePath) { L1933: const child = spawn(process.execPath, [codexCliScriptPath(), "app-server", "--stdio"], { L1934: env: { ...process.env, CODEX_HOME: codexHome }, ... L1936: }); L1937: await new Promise((resolve4, reject) => { L1938: let settled = false; L1939: let stdoutBuffer = ""; L1940: let stderr = ""; ... L1947: try { L1948: child.stdin.end(); L1949: 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 · L1932

dist/agent-helpers.jsView file

3151Trigger-reachable command-output exfiltration chain: manifest.exports -> dist/agent-helpers.js L3151: // ../../packages/core/src/agents/codex-app-server.ts L3152: import { spawn as spawn3 } from "child_process"; L3153: function createCodexAppServerForker(host) { ... L3155: const child = host.spawnServer(); L3156: return await new Promise((resolve6, reject) => { L3157: let settled = false; L3158: let stdoutBuffer = ""; L3159: let stderr = ""; ... L3166: try { L3167: child.stdin.end(); L3168: 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 · L3151

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/browser-runtime.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = negotium@0.1.32 matchedIdentity = npm:bmVnb3RpdW0:0.1.32 similarity = 0.375 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

9 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

8// ../../packages/core/src/agents/claude-provider.ts L9: import { spawn as spawn2 } from "child_process"; L10: import { existsSync as existsSync2, readFileSync as readFileSync3 } from "fs";

High

Child Process

Package source references child process execution.

dist/hosted-agent.jsView on unpkg · L8

Findings

1 Critical6 High6 Medium4 Low

CriticalPrevious Version Dangerous Deltadist/browser-runtime.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/hosted-agent.js

HighShell

HighSame File Env Network Executiondist/main.js

HighCommand Output Exfiltrationdist/main.js

HighTrigger Reachable Command Output Exfiltrationdist/agent-helpers.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requiredist/hosted-agent.js

MediumNetwork

MediumEnvironment Vars

MediumShips Build Helperdist/runtime/scripts/faster-whisper-wrapper.py

Medium

Affected versions and remediation

This report applies to negotium@0.2.20.

See all versions of negotium for other recorded verdicts.

Review the evidence and your use of negotium@0.2.20 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: 2026-08-09 21:57:43.620Z (UTC).

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