registry / AI-agent capability abuse / @luckydraw/cumulus / 0.31.54

@luckydraw/cumulus@0.31.54

RLM-based CLI chat wrapper for Claude with external history context management

AI Security Review

scanned 3mo ago · by lpm-firewall-ai

The source establishes a concrete dangerous AI-agent capability and embeds prompt-level control instructions, so it should be warned. It does not meet the block threshold because no unconsented install hook, foreign AI-control-surface mutation, or autonomous exfiltration chain was found.

Static reason

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

Trigger

User runs cumulus or cumulus-gateway and submits an agent task.

Impact

A malicious prompt or compromised agent session could read accessible local files, execute commands, and send data to attacker-selected URLs.

Mechanism

Permission-bypassed AI-agent execution with arbitrary file, shell, and network capabilities.

AI rationale

Evidence

package.jsondist/lib/gateway.jsdist/mcp/tool-handler.jsdist/lib/tools/bash.jsdist/lib/tools/web-fetch.jsdist/gateway/setup.js~/.cumulus/gateway.config.json

Network endpoints4

api.search.brave.com/res/v1/web/searchregistry.npmjs.org/@luckydraw/cumulus/latestapi.resend.complastic.luckydraw.dev

Decision evidence

public snapshot

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

Evidence for warning

dist/lib/gateway.js embeds extensive AI-agent workflow/tool-routing instructions, including commands to suppress normal tooling.
dist/mcp/tool-handler.js resolves and reads any supplied absolute file path, then persistently stores its contents.
dist/lib/gateway.js launches Claude with --permission-mode bypassPermissions.
dist/lib/tools/bash.js exposes bash -c execution to the agentic tool set.
dist/lib/tools/web-fetch.js permits arbitrary HTTP methods and URLs from agent tool input.

Evidence against

package.json has no preinstall, install, or postinstall hook; prepare only invokes husky.
Gateway service persistence in dist/gateway/setup.js occurs only after explicit cumulus-gateway setup and interactive consent.
Runtime npm installation in dist/lib/version-check.js is reached only by explicit update/rollback commands.
Observed fixed external endpoints serve declared package functions; no covert credential-exfiltration endpoint was found.

Behavioral surface

Source

ChildProcessCrypto

Source & flagged code

7 flagged

dist/tui/hooks/useClaudeProcess.jsView file

Lines 1-23javascript

1/**

2 * Hook for managing Claude subprocess and streaming.

3 */

4import { spawn } from 'child_process';

5import { useCallback, useRef } from 'react';

High

Child Process

Package source references child process execution.

dist/tui/hooks/useClaudeProcess.jsView on unpkg · L3

6import { ContextBudget } from '../../lib/context-budget.js';

7import { StreamProcessor } from '../../lib/stream-processor.js';

8import { extractTextFromStreamLine } from '../utils/streamParser.js';

9export function useClaudeProcess(options) {

10 const { mcpConfigPath, contentStore, onText, onComplete, onError, onExternalize, onTTFT } = options;

11 const processRef = useRef(null);

12 const responseRef = useRef('');

13 const bufferRef = useRef('');

14 const completedRef = useRef(false);

15 const spawnTimeRef = useRef(0);

16 const ttftFiredRef = useRef(false);

17 const kill = useCallback(() => {

18 const partial = responseRef.current;

19 if (processRef.current) {

20 processRef.current.kill('SIGTERM');

21 processRef.current = null;

22 }

23 return partial;

dist/lib/gateway.jsView file

Lines 1737-1777javascript

1737 '--mcp-config',

1738 mcpConfigPath,

1739 '--strict-mcp-config',

1740 '--input-format',

1741 'stream-json',

1742 '--effort',

1743 mergedConfig.effort ||

dist/gateway/server.jsView file

Lines 1-36javascript

1/**

2 * Gateway HTTP server — exposes the cumulus message pipeline as a REST API

3 * with SSE streaming. Channel adapters and remote clients connect here.

4 *

5 * Endpoints:

6 * POST /api/thread/:name/message — submit message, SSE stream response

7 * POST /api/thread/:name/sync — sync messages from local mode (store only, no Claude)

8 * GET /api/thread/:name/history — recent messages

9 * GET /api/thread/:name/status — thread info + adaptive state

10 * GET /api/threads — list all threads

dist/gateway/setup.jsView file

Lines 1-27javascript

1/**

2 * cumulus-gateway setup wizard and config management.

3 *

4 * Phase 1: `cumulus-gateway setup --project-root <path>` — instant non-interactive setup

5 * Phase 2: `cumulus-gateway setup` — interactive prompts with auto-detection

6 * Phase 4: `cumulus-gateway config set/get/list` — post-install config changes

7 */

8import { execSync } from 'child_process';

9import

dist/lib/version-check.jsView file

Lines 159-199javascript

159export function saveUpdateState(from, to) {

160 const state = {

161 previousVersion: from,

162 updatedAt: new Date().toISOString

Source & flagged code

7 flagged · loading source

dist/tui/hooks/useClaudeProcess.jsView file

3*/ L4: import { spawn } from 'child_process'; L5: import { useCallback, useRef } from 'react';

High

Child Process

Package source references child process execution.

dist/tui/hooks/useClaudeProcess.jsView on unpkg · L3

dist/lib/gateway.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = @luckydraw/cumulus@0.31.41 matchedIdentity = npm:QGx1Y2t5ZHJhdy9jdW11bHVz:0.31.41 similarity = 0.869 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/lib/gateway.jsView on unpkg

1757// Windows: spawn() can't directly exec .cmd/.bat shims (CVE-2024-27980). L1758: // Routing through cmd.exe is required for the npm-installed `claude.cmd`. L1759: const isWindowsShim = process.platform === 'win32' && /\.(cmd|bat|ps1)$/i.test(resolvedClaudePath);

Findings

1 Critical4 High4 Medium7 Low

CriticalPrevious Version Dangerous Deltadist/lib/gateway.js

HighChild Processdist/tui/hooks/useClaudeProcess.js

HighShelldist/lib/gateway.js

HighTrigger Reachable Persistencedist/gateway/setup.js

HighRuntime Package Installdist/lib/version-check.js

MediumNetwork

MediumEnvironment Vars

MediumInstall Persistencedist/gateway/setup.js

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

LowScripts Present

LowWeak Cryptodist/gateway/server.js

LowFilesystem

LowHigh Entropy Strings

Affected versions and remediation

This report applies to @luckydraw/cumulus@0.31.54.

See all versions of @luckydraw/cumulus for other recorded verdicts.

Review the evidence and your use of @luckydraw/cumulus@0.31.54 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: 2026-08-01 20:10:01.333Z (UTC).

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