registry / @spuentesp/lain-mcp / 0.9.1

@spuentesp/lain-mcp@0.9.1

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

AI Security Review

scanned 9d ago · by lpm-firewall-ai

The postinstall download is package-aligned and the source verifies the archive checksum and binary version. No concrete malicious behavior was identified in the inspected entrypoints and runtime source.

Static reason

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

Trigger

Package installation runs the postinstall hook; invoking the lain command launches the cached binary.

Impact

The behavior installs and runs the package’s intended CLI; no unrelated recipient, credential transfer, or consumer project mutation was identified in the inspected JavaScript.

Mechanism

The installer downloads a versioned archive and checksum, verifies the archive, and checks that the binary reports the expected version before caching it.

AI rationale

Evidence

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

Network endpoints1

github.com

Decision evidence

public snapshot

AI called this Clean at 95.0% confidence as Benign with low false-positive risk.

Evidence for AI clean decision

package.json runs scripts/install.js at postinstall, which calls the binary installer.
scripts/runtime.js fetches versioned release files from the package’s declared GitHub repository and checks the archive against its SHA-256 checksum.
The downloaded binary must report the expected package version; bin/lain.js launches it with the user’s supplied arguments.

Evidence against

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 5 file(s), 21.4 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": "0.9.1",

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"

Low

Suspicious Lifecycle Evidence

package.json runs scripts/install.js at postinstall, which calls the binary installer.

package.jsonView on unpkg · L39

41 },

42 "engines": {

43 "node": ">=18.0.0"

44 }

45}

scripts/runtime.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = @spuentesp/lain-mcp@0.9.0 matchedIdentity = npm:QHNwdWVudGVzcC9sYWluLW1jcA:0.9.0 similarity = 0.667 summary = stored previous version shares package body but lacks this dangerous source file

High

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

scripts/runtime.jsView on unpkg

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

3 High4 Medium5 Low

HighInstall Time Lifecycle Scriptspackage.json

HighUnverified Remote Native Payload Installpackage.json

HighPrevious Version Dangerous Deltascripts/runtime.js

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

Affected versions and remediation

This report applies to @spuentesp/lain-mcp@0.9.1.

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

Review the evidence and your use of @spuentesp/lain-mcp@0.9.1 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: 2026-10-14 00:04:29.606Z (UTC).

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