registry / @spuentesp/lain-mcp / 0.9.0

@spuentesp/lain-mcp@0.9.0

High-performance knowledge graph MCP server for AI coding agents with semantic search.

AI Security Review

scanned 13d ago · by lpm-firewall-ai

The install-time binary download and execution match the package’s stated purpose, and the inspected installer verifies the archive checksum before extraction. No concrete attack behavior was found in the inspected source.

Static reason

One or more suspicious static signals were detected.

Trigger

Package installation runs the postinstall hook; invoking the lain command also prepares and starts the binary.

Impact

This supplies and runs the package’s native MCP server; inspected source shows no unrelated system mutation or data exfiltration.

Mechanism

The installer downloads release files from the project’s GitHub releases and checks the archive against the downloaded SHA-256 list before extracting it into a cache.

AI rationale

Evidence

package.jsonscripts/install.jsscripts/runtime.jsbin/lain.js

Network endpoints1

github.com/spuentesp/lain/releases

Decision evidence

public snapshot

AI called this Clean at 91.0% confidence as Benign with low false-positive risk.

Evidence for AI clean decision

The package’s postinstall invokes its installer, which skips downloading in CI unless forced and when npm scripts are disabled.
The installer downloads versioned releases from the project’s GitHub repository and verifies the archive against its listed SHA-256 checksum.
The launcher runs the downloaded Lain binary with the caller’s arguments and working directory, consistent with the package’s stated MCP server purpose.

Evidence against

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 5 file(s), 20.3 KB of source, external domains: github.com

Source & flagged code

5 flagged

package.jsonView file

Lines 1-46json

2 "name": "@spuentesp/lain-mcp",

3 "version": "0.9.0",

4 "mcpName": "io.github.spuentesp/lain",

5 "description": "High-performance knowledge graph MCP server for AI coding agents with semantic search.",

6 "keywords": [

7 "mcp",

8 "model-context-protocol",

9 "ai",

10 "coding",

11 "knowledge-graph",

12 "rust",

13 "semantic-search",

High

Unverified Remote Native Payload Install

Install-time source downloads a native archive from a fixed external host without transport verification, extracts it, and installs an executable payload.

package.jsonView on unpkg · L2

14 "code-analysis"

15 ],

16 "license": "MIT",

17 "homepage": "https://github.com/spuentesp/lain",

18 "repository": {

19 "type": "git",

20 "url": "https://github.com/spuentesp/lain.git"

21 },

22 "bin": {

23 "lain": "./bin/lain.js"

24 },

25 "files": [

26 "bin/",

27 "scripts/"

28 ],

29 "os": [

30 "darwin",

31 "linux",

32 "win32"

33 ],

34 "cpu": [

35 "x64",

36 "arm64"

37 ],

38 "scripts": {

39 "postinstall": "node scripts/install.js",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L39

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L39

40 "test": "node scripts/install.test.js && node bin/lain.test.js"

41 },

Low

Suspicious Lifecycle Evidence

The package’s postinstall invokes its installer, which skips downloading in CI unless forced and when npm scripts are disabled.

package.jsonView on unpkg · L38

42 "engines": {

43 "node": ">=18.0.0"

44 }

45}

scripts/runtime.jsView file

Lines 22-62javascript

22 return version;

23}

25function selectedVersion(env = process.env) {

26 return normalizeVersion(env.LAIN_VERSION || require(

Source & flagged code

5 flagged · loading source

package.jsonView file

•scripts.postinstall = node scripts/install.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

2scripts.postinstall = node scripts/install.js Install-time code downloads an unverified remote native executable, stages it locally, activates an executable path, and exposes it to process execution. L4: const fs = require('fs'); L5: const https = require('https'); L6: const os = require('os'); L7: const path = require('path'); L8: const { execFileSync, spawnSync } = require('child_process'); L9: ... L11: L12: function targetFor(platform = process.platform, arch = process.arch) { L13: const targets = { 'darwin-arm64': 'aarch64-apple-darwin', 'linux-x64': 'x86_64-unknown-linux-gnu', 'win32-x64': 'x86_64-pc-windows-msvc' }; L14: const target = targets[`${platform}-${arch}`]; L15: if (!target) throw new Error(`Unsupported platform: ${platform}-${arch}`); L16: return target; L2: L3: const {

High

Unverified Remote Native Payload Install

Install-time source downloads a native archive from a fixed external host without transport verification, extracts it, and installs an executable payload.

package.jsonView on unpkg · L2

•scripts.postinstall = node scripts/install.js

Findings

2 High4 Medium6 Low

HighInstall Time Lifecycle Scriptspackage.json

HighUnverified Remote Native Payload Installpackage.json

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

LowSuspicious Lifecycle Evidencepackage.json

LowAi Review Evidencescripts/runtime.js

Affected versions and remediation

This report applies to @spuentesp/lain-mcp@0.9.0.

See all versions of @spuentesp/lain-mcp for other recorded verdicts.

Review the evidence and your use of @spuentesp/lain-mcp@0.9.0 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: 2026-10-10 11:15:51.291Z (UTC).

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