registry / Remote code execution / alvin-bot / 5.131.0

alvin-bot@5.131.0

Self-hosted autonomous AI agent on Telegram, Slack, Discord, WhatsApp, Signal, terminal & web. Claude Agent SDK + multi-provider engine with auto-failover, detached sub-agents, zero-config memory. Local-first, telemetry-free.

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

No install-time malware chain was found, but the enabled plugin has a concrete command-injection flaw and the package contains opaque, permission-bypassing agent execution. This warrants a warning for a critical vulnerability rather than a malware block.

Static reason

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

Trigger

A user who can invoke the email plugin sends an email search command containing shell metacharacters.

Impact

Commands run with the bot process's privileges, allowing access to its local data and configured credentials.

Mechanism

Shell command injection through string interpolation into execSync.

AI rationale

Evidence

plugins/email/index.jsclaude-bridge/src/claude.jspackage.json

Decision evidence

public snapshot

AI called this Suspicious at 96.0% confidence as Critical Vulnerability with low false-positive risk.

Evidence for warning

The published distribution is deliberately obfuscated, making its runtime behavior difficult to audit.
The Claude bridge renames platform and tool identifiers as a stated detection bypass, then launches Claude with permission checks disabled.
The email plugin passes chat-controlled search text directly into a shell command, creating command injection when the plugin is enabled.

Evidence against

The manifest has no preinstall, install, or postinstall hook; its only lifecycle hook is prepublishOnly.
There is no dependency on another release of this package.
The inspected bridge and email sources do not show automatic secret exfiltration or a maintainer-controlled network endpoint.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShellWebSocket

Supply chain

HighEntropyStrings

Source & flagged code

19 flagged

claude-bridge/src/claude.jsView file

Lines 1-22javascript

1'use strict';

3const { spawn } = require('child_process');

4const crypto = require('crypto');

High

Child Process

Package source references child process execution.

claude-bridge/src/claude.jsView on unpkg · L2

Medium

Dynamic Require

Package source references dynamic require/import behavior.

claude-bridge/src/claude.jsView on unpkg · L2

6const CLAUDE_BIN = process.env.CLAUDE_BIN || 'claude';

Low

Weak Crypto

Package source references weak cryptographic algorithms.

claude-bridge/src/claude.jsView on unpkg · L2

8// --- Stable alias per CLI session ---

9// Each session keeps one alias so resumed requests don't accumulate different

10// names in the Claude context (which would leak un-replaced aliases in output).

11const PREFIXES = ['Chat', 'Dev', 'Run', 'Ask', 'Net', 'App', 'Zen', 'Arc', 'Dot', 'Amp', 'Hex', 'Orb', 'Elm', 'Oak', 'Sky'];

12const SUFFIXES = ['Kit', 'Box', 'Pod', 'Hub', 'Lab', 'Ops', 'Bay', 'Tap', 'Rim', 'Fog', 'Dew', 'Fin', 'Gem', 'Jet', 'Cog'];

13const pick = (arr) => arr[Math.floor(Math.random() * arr.length)];

14const sessionAliasMap = new Map(); // sessionId → { alias, aliasLower, lastUsed }

15const sessionTokenMaps = new Map(); // sessionId → Map<original, replacement>

17function getSessionAlias(sessionId) {

18 if (!sessionId) {

19 const alias = pick(PREFIXES) + pick(SUFFIXES);

20 return { alias, aliasLower: alias.toLowerCase() };

21 }

22 let entry = sessionAliasMap.get(sessionId);

•matchType = normalized_sha256 matchedPackage = alvin-bot@5.100.0 matchedPath = claude-bridge/src/claude.js matchedIdentity = npm:YWx2aW4tYm90:5.100.0 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.

claude-bridge/src/claude.jsView on unpkg

dist/providers/tool-executor.jsView file

Lines 1-1javascript

1const _0x4f1f40=_0x556e,_0x5d25ca=_0x556e;(function(_0x127684,_0x35e7c1){const _0x2d738f=_0x556e,_0x2c69f4=_0x556e,_0x3dbd29=_0x127684();while(

bin/cli.jsView file

Lines 2-42javascript

3/**

4 * Alvin Bot CLI — Setup, manage, and chat with your AI agent.

5 *

6 * Usage:

7 * alvin-bot setup — Interactive setup wizard

8 * alvin-bot tui — Terminal chat UI

9 * alvin-bot doctor — Check configuration

10 * alvin-bot audit — Security health check

11 * alvin-bot update — Pull latest & rebuild

12 * alvin-bot start — Start the bot

dist/services/browser-manager.jsView file

1const _0x1c073a=_0x67dc;(function(_0x3216fa,_0x4a5cb5){const _0x1a43c1=_0x67dc,_0x77bbf7=_0x67dc,_0x559e31=_0x3216fa();while(!![]){try{const _0x17d7fc=-parseInt(_0x1a43c1(0x168))/(...

High

Command Output Exfiltration

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

dist/services/browser-manager.jsView on unpkg · L1

dist/middleware/auth.jsView file

1(function(_0x3cd12c,_0xce4539){const _0x324685=_0x33ee,_0x4b7252=_0x33ee,_0x566327=_0x3cd12c();while(!![]){try{const _0x2fbda6=parseInt(_0x324685(0x1f7))/(-0x18c+-0x1615+0x17a2)+-p...

High

Obfuscated Payload Loader

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

dist/middleware/auth.jsView on unpkg · L1

install.shView file

•path = install.sh kind = build_helper sizeBytes = 10656 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

install.shView on unpkg

claude-bridge/src/claude.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 14

High

Semantic Analysis Limited

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

claude-bridge/src/claude.js#virtual:normalized:round1View on unpkg

claude-bridge/src/server.jsView file

•matchType = normalized_sha256 matchedPackage = alvin-bot@5.100.0 matchedPath = claude-bridge/src/server.js matchedIdentity = npm:YWx2aW4tYm90:5.100.0 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.

claude-bridge/src/server.jsView on unpkg

plugins/email/index.jsView file

•matchType = normalized_sha256 matchedPackage = alvin-bot@5.100.0 matchedPath = plugins/email/index.js matchedIdentity = npm:YWx2aW4tYm90:5.100.0 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.

plugins/email/index.jsView on unpkg

Source & flagged code

19 flagged · loading source

claude-bridge/src/claude.jsView file

2L3: const { spawn } = require('child_process'); L4: const crypto = require('crypto');

High

Child Process

Package source references child process execution.

claude-bridge/src/claude.jsView on unpkg · L2

High

Known Malware Source Similarity

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

claude-bridge/src/claude.jsView on unpkg

2L3: const { spawn } = require('child_process'); L4: const crypto = require('crypto');

Medium

Dynamic Require

Package source references dynamic require/import behavior.

claude-bridge/src/claude.jsView on unpkg · L2

Findings

15 High7 Medium8 Low

HighChild Processclaude-bridge/src/claude.js

HighShelldist/providers/tool-executor.js

HighEntrypoint Build Divergencebin/cli.js

HighSame File Env Network Executionbin/cli.js

HighCommand Output Exfiltrationdist/services/browser-manager.js

HighSandbox Evasion Gated Capabilitybin/cli.js

HighObfuscated Payload Loaderdist/middleware/auth.js

HighCross File Remote Execution Contextbin/cli.js

HighTrigger Reachable Persistencebin/cli.js

HighRuntime Package Installbin/cli.js

HighObfuscated

HighSemantic Analysis Limitedclaude-bridge/src/claude.js#virtual:normalized:round1

Affected versions and remediation

This report applies to alvin-bot@5.131.0.

See all versions of alvin-bot for other recorded verdicts.

Review the evidence and your use of alvin-bot@5.131.0 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: 2026-09-08 13:59:16.106Z (UTC).

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

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Runtime surface

Behavioral surface

Source & flagged code