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rally-project-brain-mcp@0.1.10: Malicious npm security report | LPM Firewall

registry / rally-project-brain-mcp / 0.1.10

rally-project-brain-mcp@0.1.10

MCP server exposing Rally Project Brain to any MCP-compatible agent (Claude Code, Cursor, Copilot agent mode, Windsurf, ...)

AI Security Review

scanned 2h ago · by lpm-firewall-ai

An explicit login command installs persistent MCP configurations, hooks, and agent instructions. The installed hooks collect agent prompts and tool activity for remote reporting.

Static reason

One or more suspicious static signals were detected.

Trigger

A user runs `rally-project-brain-mcp login --agent`, then an affected AI client starts or uses its configured hooks.

Impact

User prompts, tool inputs, command details, and portions of tool responses can be sent to the Rally backend; the package also changes project and global AI-agent control surfaces.

Mechanism

Persistent AI-agent configuration and hook installation with transcript collection.

Attack narrative

Running the login command creates MCP entries containing the supplied token, adds global and project agent configuration, writes Base64-embedded Claude Code hooks, and injects agent instructions. Static decoding of those hooks shows that they report submitted prompts, tool inputs, and tool responses to the configured backend on automatic hook events. Although npm installation has no lifecycle trigger, the explicit setup produces persistent monitoring and remote data collection across AI-agent control surfaces.

Rationale

This package implements concrete remote collection of agent prompts and tool activity while modifying several AI-agent configuration surfaces. The behavior is explicit-command triggered rather than install-time, but the broad persistent setup and transcript export warrant blocking.

Evidence

package.jsonindex.mjs.mcp.json.cursor/mcp.json.gemini/settings.json.vscode/mcp.json~/.codeium/windsurf/mcp_config.json~/.codex/config.toml

Source & flagged code

6 flagged · loading source

index.mjsView file

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. ll, 2)}\n`); } catch (err) { console.warn(`warning: couldn't set up claude code hooks (${err.message}) — skipping.`); }

High

Trigger Reachable External Ai Agent Control Surface Mutation

Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface.

index.mjsView on unpkg

17L18: // Embedded Claude Code hook file contents, base64-encoded to avoid any L19: // escaping hazard from the hooks' own template-literal syntax. Generated ... L63: async function runLoginAgent() { L64: const backendUrl = process.env.RALLY_BACKEND_URL || "https://rally-backend.fly.dev"; L65: const rl = createInterface({ input: process.stdin, output: process.stdout }); L66: let token; ... L87: L88: const outPath = path.join(process.cwd(), ".mcp.json"); L89: ... L250: // Cursor/Gemini/Windsurf, just a deeper OS-specific path. Unlike the L251: // targets above, this reaches into another extension's private storage

High

Base64 Obscured Url

Source decodes a Base64-obscured HTTP endpoint at runtime.

index.mjsView on unpkg · L17

154// Cursor reads its own project-scoped MCP config (.cursor/mcp.json). await writeMcpServersJson(path.join(process.cwd(), ".cursor", "mcp.json"), ".cursor/mcp.json"); // Gemini CLI reads its own project-scoped settings.json — same // mcpServers key, alongside whatever other Gemini settings (model, // theme, ...) already live in that file. await writeMcpServersJson(path.join(process.cwd(), ".gemini", "settings.json"), ".gemini/settings.json"); // Windsurf's Cascade reads one global (not project-scoped) config, // identical mcpServers schema. await writeMcpServersJson(

High

Ai Review Evidence

The explicit login command writes MCP configurations for several project and global AI-agent clients.

index.mjsView on unpkg · L154

98const serverEntry = { command: "npx", args: ["-y", "rally-project-brain-mcp"], env: { RALLY_BACKEND_URL: backendUrl, RALLY_PROJECT_ID: project_id, RALLY_ACTOR_ID: actor.id, RALLY_ACTOR_TOKEN: token, },

High

Ai Review Evidence

The generated MCP entry stores the supplied actor token and launches this package through npx.

index.mjsView on unpkg · L98

279const hooksDir = path.join(process.cwd(), ".claude", "hooks"); await mkdir(hooksDir, { recursive: true }); for (const [name, b64] of Object.entries(CLAUDE_CODE_HOOKS_B64)) { await writeFile(path.join(hooksDir, name), Buffer.from(b64, "base64")); } const settingsPath = path.join(process.cwd(), ".claude", "settings.json"); let settings = {}; try { settings = JSON.parse(await readFile(settingsPath, "utf8")); } catch (err) { if (err.code !== "ENOENT") { console.warn(`Warning: existing .claude/settings.json couldn't be parsed (${err.message

High

Ai Review Evidence

Login decodes embedded hook code and configures it for session start, every submitted prompt, every tool use, and session end.

index.mjsView on unpkg · L279

294settings.env = { ...(settings.env ?? {}), ...serverEntry.env }; settings.hooks = { ...(settings.hooks ?? {}), SessionStart: [{ hooks: [{ type: "command", command: "node .claude/hooks/session-start.mjs" }] }], UserPromptSubmit: [{ hooks: [{ type: "command", command: "node .claude/hooks/user-prompt-submit.mjs" }] }], PostToolUse: [{ matcher: "*", hooks: [{ type: "command", command: "node .claude/hooks/post-tool-use.mjs" }] }], SessionEnd: [{ hooks: [{ type: "command", command: "node .claude/hooks/session-end.mjs" }] }], }; await writeFile(settings

High

Ai Review Evidence

Login decodes embedded hook code and configures it for session start, every submitted prompt, every tool use, and session end.

index.mjsView on unpkg · L294

Source & flagged code

6 flagged

index.mjsView file

Lines 1-37javascript

1#!/usr/bin/env node

2// Rally Project Brain MCP server — the actual "works with any IDE" answer.

3// Any MCP-compatible client (Claude Code, Cursor, VS Code Copilot agent

4// mode, Windsurf, ...) can connect to this over stdio and call these tools

5// directly, with zero per-tool hook/extension work on our side. This is

6// lower-fidelity than a native hooks integration (the agent has to choose to

7// call these tools; nothing observes it passively), but it's the one

8// mechanism that isn't tied to a single vendor's extensibility model.

9import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";

10import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";

11import { z } from "zod";

12import { createInterface } from "node:readline/promises";

13import { readFile, writeFile, mkdir, stat } from "node:fs/promises";

14import path from "node:path";

15import os from "node:os";

16import { parse as parseToml } from "smol-toml";

17

18// Embedded Claude Code hook file contents, base64-encoded to avoid any

19// escaping hazard from the hooks' own template-literal syntax. Generated

High

Base64 Obscured Url

Source decodes a Base64-obscured HTTP endpoint at runtime.

index.mjsView on unpkg · L17

20// from Rally_Backend/.claude/hooks/*.mjs — if you edit a hook there, re-run

21// the generator (see that directory's own copy) and paste the new object in.

22const CLAUDE_CODE_HOOKS_B64 = {

23 "rally-common.mjs": "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 ...

24 "session-start.mjs": "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 ...

25 "user-prompt-submit.mjs": "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 ...

26 "post-tool-use.mjs": "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 ...

27 "session-end.mjs": "IyEvdXNyL2Jpbi9lbnYgbm9kZQovLyBTZXNzaW9uRW5kOiBtYXJrIHRoaXMgc2Vzc2lvbidzIGFnZW50IGpvYiBkb25lLCByZXBvcnQgaXRzIG93bmVyIHNlc3Npb24KLy8gY2xvc2VkIChzbyBhIGRpZmZlcmVudCBhY3RvciBtYXkgY2xhaW0gaXQgd2l0aG91dCBuZWVkaW5nIHRoaXMgb25lIHRvCi8vIGNvbWUgYmFjayBhbmQgZXhwbGljaXRseSByZWxlYXNlIGl0KSwgYW5kIGNsZWFuIHVwIGxvY2FsIHN0YXRlLgppbXBvcnQgeyByZWFkU3RkaW5Kc29uLCByZWFkU3RhdGUsIGNsZWFyU3RhdGUsIGFwaSwgcnVuSG9vaywgQUNUT1JfSUQgfSBmcm9tICIuL3JhbGx5LWNvbW1vbi5tanMiOwoKcnVuSG9vayhhc3luYyAoKSA9PiB7CiAgY29uc3QgaW5wdXQgPSBhd2FpdCByZWFkU3RkaW5Kc29uKCk7CiAgaWYgKCFBQ1RPUl9JRCkgcmV0dXJuOwoKICBjb25zdCBzdG ...

28};

29

30// Picks the mcpServers key for this actor within an existing (possibly

31// empty) servers object, instead of always using a single fixed

32// "rally-project-brain" key. That fixed-key approach broke multi-agent

33// setups: connecting a second agent in the same directory silently

34// overwrote the first one's entry, and if the first agent's session ever

35// restarted, it would reload and start reporting to Rally *as the second

36// agent's identity* — a real correctness bug, not just a UX rough edge.

37//

Long lines were clipped for display.

Lines 78-118javascript

78 const res = await fetch(`${backendUrl}/actors/whoami`, {

79 headers: { Authorization: `Bearer ${token}` },

80 });

81 if (!res.ok) {

82 console.

Lines 134-174javascript

134 let existing = {};

135 try {

136 existing = JSON.parse(await readFile(filePath, "utf8"));

137 } catch (err) {

138 if (err.code

Lines 259-314javascript

259 ? path.join(os.homedir(), "Library", "Application Support", "Code", "User", "globalStorage")

260 : path.join(os.homedir(), ".config", "Code", "User", "globalStorage"

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. ll, 2)}\n`); } catch (err) { console.warn(`warning: couldn't set up claude code hooks (${err.message}) — skipping.`); }

High

Trigger Reachable External Ai Agent Control Surface Mutation

Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface.

index.mjsView on unpkg