@spuentesp/lain-mcp@0.8.0
High-performance knowledge graph MCP server for AI coding agents with semantic search.
AI Security Review
scanned 15d ago · by lpm-firewall-aiThe postinstall installs the package’s native component from its upstream release host, but the checksum is fetched from that same host and does not independently authenticate the binary. This is a real supply-chain risk without inspected evidence of malicious behavior, so warn rather than block.
Static reason
One or more suspicious static signals were detected.
Trigger
The npm postinstall runs, except when CI is set without the force flag or npm scripts are disabled.
Impact
A compromised or malicious release could place executable code in the user cache for later use by the package command; no concrete malicious payload behavior was identified in the inspected source.
Mechanism
The installer fetches the release checksum and archive, verifies the archive against that checksum, extracts the executable, and runs it for a version check.
AI rationale
The postinstall installs the package’s native component from its upstream release host, but the checksum is fetched from that same host and does not independently authenticate the binary. This is a real supply-chain risk without inspected evidence of malicious behavior, so warn rather than block.
Evidence
package.jsonscripts/install.jsscripts/runtime.js
Network endpoints1
github.com/spuentesp/lain/releases
Decision evidence
public snapshotAI called this Suspicious at 84.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The package’s postinstall calls an installer that downloads a native release archive and checksum from GitHub.
- The archive is checked against the downloaded checksum, but the checksum and archive come from the same release host.
- The installer extracts and runs the binary for a version check, then stores it in a versioned cache.
Evidence against
- The download targets the package’s declared upstream repository and a release matching the package version by default.
- The postinstall skips the download in CI unless explicitly forced, and when npm scripts are disabled.
- The source shows no credential collection, unrelated network destination, or mutation of an AI-agent control surface.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStringsUrlStrings
Source & flagged code
5 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node scripts/install.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg2scripts.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 High6 Medium4 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
MediumSuspicious Lifecycle Evidencepackage.json
MediumSuspicious Lifecycle Evidencescripts/install.js
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to @spuentesp/lain-mcp@0.8.0.
See all versions of @spuentesp/lain-mcp for other recorded verdicts.
- Review the evidence and your use of @spuentesp/lain-mcp@0.8.0 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: .
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