registry / AI-agent capability abuse / negotium / 0.3.11

negotium@0.3.11

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

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The package contains concrete high-risk control of a foreign AI-agent session and permission model, so it warrants a warning. The inspected lifecycle downloader verifies hashes and no confirmed credential-redirection/exfiltration chain was found, so source facts do not justify a publish block.

Static reason

One or more suspicious static signals were detected.

Trigger

Running Negotium with its Claude-agent workflow.

Impact

A resumed Claude session can inherit package-created history and execute without normal permission prompts.

Mechanism

Synthetic foreign-agent session injection with permission bypass.

AI rationale

Evidence

package.jsoninstall-browser-rs.mjsinstall-bash-rs.mjsdist/runtime/src/agents/rollout/claude.tsdist/runtime/src/agents/claude-provider.tsdist/runtime/src/agents/fixtures/claude-attachments.jsonl~/.negotium/binaries/browser-rs/v0.1.21/browser-rs~/.negotium/binaries/bash-rs/v0.1.7/bash-rs~/.claude/projects/<encoded-cwd>/<sessionId>.jsonl

Network endpoints2

github.com/maestrojeong/browser-rs-mcp/releases/download/v0.1.21github.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 low false-positive risk.

Evidence for warning

Runtime fabricates Claude session records under ~/.claude and replays bundled agent attachments.
Fabricated Claude records mark user turns as bypassPermissions.
Claude provider explicitly enables dangerously skipping permissions.
Postinstall downloads and installs executable binaries.

Evidence against

No fixed credential gateway or command-output exfiltration was confirmed.
Postinstall downloads are SHA-256 verified and stored under the package-owned .negotium state directory.
Snippet publishing is disabled unless an operator supplies its endpoint via environment.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 255 file(s), 5.69 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

•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/chunk-0ynjwr50.jsView file

23// ../../[redacted].ts L24: import { execFileSync } from "child_process"; L25: import { randomBytes } from "crypto";

High

Child Process

Package source references child process execution.

dist/chunk-0ynjwr50.jsView on unpkg · L23

200var TSX_BIN = resolveDependencyBin("tsx"); L201: var TSX_LOADER = createRequire(import.meta.url).resolve("tsx"); L202: var TSCONFIG_PATH = resolve(PROJECT_ROOT, "tsconfig.json");

Medium

Dynamic Require

Package source references dynamic require/import behavior.

dist/chunk-0ynjwr50.jsView on unpkg · L200

dist/main.jsView file

1942async function bootstrapCodexModelCache(codexHome, cachePath) { L1943: const child = spawn(process.execPath, [codexCliScriptPath(), "app-server", "--stdio"], { L1944: env: { ...process.env, CODEX_HOME: codexHome }, L1945: stdio: ["pipe", "pipe", "pipe"] L1946: }); L1947: await new Promise((resolve4, reject) => { L1948: 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 · L1942

1942async function bootstrapCodexModelCache(codexHome, cachePath) { L1943: const child = spawn(process.execPath, [codexCliScriptPath(), "app-server", "--stdio"], { L1944: env: { ...process.env, CODEX_HOME: codexHome }, ... L1946: }); L1947: await new Promise((resolve4, reject) => { L1948: let settled = false; L1949: let stdoutBuffer = ""; L1950: let stderr = ""; ... L1957: try { L1958: child.stdin.end(); L1959: 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 · L1942

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

•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,

High

Entrypoint Foreign Package Code Overwrite

Manifest-reachable source overwrites another installed package with package-defined remote behavior.

dist/mcp-factories.jsView on unpkg

dist/agent-helpers.jsView file

3194Trigger-reachable command-output exfiltration chain: manifest.exports -> dist/agent-helpers.js L3194: // ../../packages/core/src/agents/codex-app-server.ts L3195: import { spawn as spawn3 } from "child_process"; L3196: function createCodexAppServerForker(host) { ... L3198: const child = host.spawnServer(); L3199: return await new Promise((resolve6, reject) => { L3200: let settled = false; L3201: let stdoutBuffer = ""; L3202: let stderr = ""; ... L3209: try { L3210: child.stdin.end(); L3211: 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 · L3194

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

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/chunk-0ynjwr50.jsView file

23// ../../[redacted].ts L24: import { execFileSync } from "child_process"; L25: import { randomBytes } from "crypto";

High

Child Process

Package source references child process execution.

dist/chunk-0ynjwr50.jsView on unpkg · L23

Findings

8 High6 Medium4 Low

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processdist/chunk-0ynjwr50.js

HighShell

HighSame File Env Network Executiondist/main.js

HighCredential Redirect Persistencedist/mcp-factories.js

HighEntrypoint Foreign Package Code Overwritedist/mcp-factories.js

HighCommand Output Exfiltrationdist/main.js

HighTrigger Reachable Command Output Exfiltrationdist/agent-helpers.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requiredist/chunk-0ynjwr50.js

MediumNetwork

MediumEnvironment Vars

MediumShips Build Helper

Affected versions and remediation

This report applies to negotium@0.3.11.

See all versions of negotium for other recorded verdicts.

Review the evidence and your use of negotium@0.3.11 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: 2026-08-12 00:41:46.023Z (UTC).

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