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@mrrlin-dev/mcp@0.4.63: Suspicious npm security report (Warn) | LPM Firewall

registry / @mrrlin-dev/mcp / 0.4.63

@mrrlin-dev/mcp@0.4.63

CLI that runs the local Director bridge under PM2 and forwards chat turns to a locally-spawned Codex `app-server`. Installed globally on operator boxes via `npm install -g @mrrlin-dev/mcp` (the official install path; `pnpm install -g` also works if the op

AI Security Review

scanned 26d ago · by lpm-firewall-ai

Review flagged AI-agent configuration or capability changes. This remains warn-only unless evidence shows foreign-agent hijack through preinstall/install/postinstall, hidden persistence, exfiltration, remote code execution, or other concrete malicious behavior.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; source fingerprint signature matched known malicious package; routed for review

Trigger

Global npm installation, or running `mrrlin-mcp configure bridge`; the update workflow runs while the director bridge is active.

Impact

Can restart a matching bridge and extend Codex or Claude with package-controlled MCP commands; the update path can request a global package upgrade after operator confirmation.

Mechanism

PM2 signaling, agent configuration mutation, and agent-mediated self-update prompting.

AI rationale

The package has real agent-extension and lifecycle control behavior, including a narrowly scoped automatic PM2 signal and explicit configuration mutations. Source inspection did not confirm the scanner's claimed obfuscated loader or credential exfiltration, so blocking as malware is not supported.

Evidence

package.jsonscripts/postinstall-restart.cjsdist/bin.cjs~/.codex/config.toml~/.codex/prompts/report-issue.md~/.claude.json~/.mrrlin

Network endpoints2

registry.npmjs.org/@mrrlin-dev/mcp/latest

Source & flagged code

11 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/postinstall-restart.cjs

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

dist/bin.cjsView file

20647var import_node_path37 = __toESM(require("node:path"), 1); L20648: var import_node_child_process19 = require("node:child_process"); L20649: var import_node_fs24 = require("node:fs");

High

Child Process

Package source references child process execution.

dist/bin.cjsView on unpkg · L20647

21466// src/agent-version.ts L21467: var import_node_child_process2 = require("node:child_process"); L21468: var import_semver = __toESM(require_semver2(), 1); L21469: var SEMVER_RE = /\b\d+\.\d+\.\d+(?:-[A-Za-z0-9.-]+)?\b/; L21470: var CODEX_PACKAGE = process.env.MRRLIN_CODEX_PACKAGE?.trim() || "@openai/codex"; L21471: var distTagsUrl = (pkg) => `https://registry.npmjs.org/-/package/${encodeURIComponent(pkg)}/dist-tags`; L21472: function parseCodexVersion(raw) {

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/bin.cjsView on unpkg · L21466

•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration. dist/bin.cjs: delete opts.headers.authorization; if (opts.auth && !options.headers.authorization) { options.headers.authorization = "Basic " + Buffer.from(opts.auth).toString("base64"); var fs$writeFile = fs12.writeFile; fs12.writeFile = writeFile5; function writeFile5(path25, data, options, cb) { return go$writeFile(path25, data, options, cb); function go$writeFile(path26, data2, options2, cb2, startTime) {

High

Credential Redirect Persistence

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

dist/bin.cjsView on unpkg

417try { L418: const utilInspect = eval("require('util').inspect"); L419: _custom = utilInspect.custom; ... L1620: if (global.Buffer && global.Buffer.isBuffer(str)) { L1621: str = str.toString("utf8"); L1622: } ... L2063: "use strict"; L2064: var debug = typeof process === "object" && process.env && process.env.NODE_DEBUG && /\bsemver\b/i.test(process.env.NODE_DEBUG) ? (...args) => console.error("SEMVER", ...args) : () ... L2065: }; ... L4016: kStatusCode: Symbol("status-code"), L4017: kWebSocket: Symbol("websocket"), L4018: NOOP: () => {

High

Command Output Exfiltration

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

dist/bin.cjsView on unpkg · L417

8122if (!fs11[gracefulQueue]) { L8123: queue = global[gracefulQueue] || []; L8124: publishQueue(fs11, queue);

High

Obfuscated Payload Loader

Source contains an obfuscated payload loader that reconstructs and executes hidden code.

dist/bin.cjsView on unpkg · L8122

•matchType = normalized_sha256 matchedPackage = @mrrlin-dev/mcp@0.4.72 matchedPath = dist/bin.cjs matchedIdentity = npm:QG1ycmxpbi1kZXYvbWNw:0.4.72 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/bin.cjsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = a5388ff737d688ee signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = @mrrlin-dev/mcp@0.4.72 matchedPath = dist/bin.cjs matchedIdentity = npm:QG1ycmxpbi1kZXYvbWNw:0.4.72 similarity = 1.000 shingleOverlap = 2 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

dist/bin.cjsView on unpkg

417try { L418: const utilInspect = eval("require('util').inspect"); L419: _custom = utilInspect.custom;

Low

Eval

Package source references a known benign dynamic code generation pattern.

dist/bin.cjsView on unpkg · L417

417try { L418: const utilInspect = eval("require('util').inspect"); L419: _custom = utilInspect.custom; ... L1620: if (global.Buffer && global.Buffer.isBuffer(str)) { L1621: str = str.toString("utf8"); L1622: } ... L2063: "use strict"; L2064: var debug = typeof process === "object" && process.env && process.env.NODE_DEBUG && /\bsemver\b/i.test(process.env.NODE_DEBUG) ? (...args) => console.error("SEMVER", ...args) : () ... L2065: }; ... L4016: kStatusCode: Symbol("status-code"), L4017: kWebSocket: Symbol("websocket"), L4018: NOOP: () => {

Low

Weak Crypto

Package source references weak cryptographic algorithms.

dist/bin.cjsView on unpkg · L417

scripts/postinstall-restart.cjs#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

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

scripts/postinstall-restart.cjs#virtual:normalized:round1View on unpkg