registry / AI-agent capability abuse / negotium / 0.4.8

negotium@0.4.8

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 established as malware, but it deliberately manufactures persistent Codex session state with elevated execution metadata. This warrants a warning for dangerous AI-agent capability abuse.

Static reason

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

Trigger

A Negotium topic/API agent switch with conversation history; npm postinstall for helper binaries.

Impact

A resumed Codex session can inherit package-authored danger-full-access/no-approval metadata and prior conversation content.

Mechanism

Synthetic Codex transcript creation with elevated runtime policy metadata.

AI rationale

Evidence

package.jsoninstall-browser-rs.mjsinstall-bash-rs.mjsdist/runtime/src/agents/topic-agent-switch.tsdist/runtime/src/agents/rollout/codex.tsdist/runtime/src/agents/fixtures/codex-shell.jsonl~/.codex/sessions/<yyyy>/<mm>/<dd>/rollout-<ts>-<threadId>.jsonl~/.negotium/binaries/browser-rs/v0.1.22/browser-rs~/.negotium/binaries/bash-rs/v0.1.7/bash-rs

Network endpoints2

github.com/maestrojeong/browser-rs-mcp/releases/download/v0.1.22github.com/maestrojeong/bash-rs-mcp/releases/download/v0.1.7

Decision evidence

public snapshot

AI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

Runtime agent switching forges and writes native Codex rollout files.
Forged rollout replaces developer metadata with danger-full-access and no approval.
Bundled fixture contains AI-facing instruction text, an injection-like artifact.
postinstall downloads executable helpers into ~/.negotium.

Evidence against

Rollout creation is reached through named agent-switch operations, not install hooks.
No credential upload or non-local runtime endpoint was found in reviewed sources.
Install downloads use fixed GitHub releases and SHA-256 verification.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 253 file(s), 5.69 MB of source, external domains: 127.0.0.1, api.deepseek.com, github.com, www.w3.org

Source & flagged code

11 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": "^1.30.0",

140 "@openai/codex-sdk": "0.147.0",

141 "diff": "^9.0.0",

142 "maestro-agent-sdk": "0.2.8",

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

144 "orchgraph": "0.2.1",

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 1-29javascript

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

1089async function bootstrapCodexModelCache(codexHome, cachePath) { L1090: const child = spawn(process.execPath, [codexCliScriptPath(), "app-server", "--stdio"], { L1091: env: { ...process.env, CODEX_HOME: codexHome }, L1092: stdio: ["pipe", "pipe", "pipe"] L1093: }); L1094: await new Promise((resolve4, reject) => { L1095: 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/mcp-factories.jsView on unpkg · L1089

•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

•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior. dist/mcp-factories.js: writeFileSync const candidate = resolve(dir, "node_modules", ".bin", name); writeFileSync(secretFile, `${envValue} writeFileSync(secretFile, `${secret} writeFileSync as writeFileSync3 writeFileSync3(fd, payload); import { existsSync as existsSync4, readFileSync as readFileSync5, writeFileSync as writeFileSync4 } from "fs"; copyFileSync,

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@0.4.6 matchedIdentity = npm:bmVnb3RpdW0:0.4.6 similarity = 0.892 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

11 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 Critical8 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/mcp-factories.js

HighCredential Redirect Persistencedist/mcp-factories.js

HighEntrypoint Foreign Package Code Overwritedist/mcp-factories.js

HighCommand Output Exfiltrationdist/mcp-factories.js

HighTrigger Reachable Command Output Exfiltrationdist/mcp-factories.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requiredist/hosted-agent.js

Medium

Affected versions and remediation

This report applies to negotium@0.4.8.

See all versions of negotium for other recorded verdicts.

Review the evidence and your use of negotium@0.4.8 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: 2026-08-17 13:17:47.336Z (UTC).

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