Is chrisleekr/langchain-playground safe to install?

chrisleekr/langchain-playground was flagged as CRITICAL RISK (risk score 144) with 32 findings detected across 297 files. Review the findings before installing.

What security issues were found in chrisleekr/langchain-playground?

Sigil detected 32 findings in chrisleekr/langchain-playground, including patterns related to provenance, install_hooks, credentials, obfuscation. See the full scan report for details.

Scans/github/chrisleekr/langchain-playground

chrisleekr/langchain-playground

github

Summary

chrisleekr/langchain-playground v2026-03-21 was classified as CRITICAL RISK with a risk score of 144. Sigil detected 32 findings across 297 files, covering phases including provenance, install hooks, credential access, obfuscation. Review the findings below before installing this package.

Package description: A playground for LangChain.js, LangGraph, NewRelic GraphQL, Sentry, Slack, Model Context Protocol (MCP) and other LLM-related tools.

CRITICAL RISK(144)

v2026-03-21

23 March 2026, 11:54 UTC

by Sigil Bot

Risk Score

144

Findings

Files Scanned

297

Provenance

Registry

https://github.com/chrisleekr/langchain-playground

Repository

https://github.com/chrisleekr/langchain-playground

Scanned From

https://github.com/chrisleekr/langchain-playground.git

Findings by Phase

•

Phase Ordering

Phases are ordered by criticality, with the most dangerous at the top. Click any phase header to expand or collapse its findings. Critical phases are expanded by default.

install-npm-postinstall

CRITICAL

npm lifecycle script — runs automatically on install

repo/package.json:9

    "prepare": "husky",
    "postinstall": "npm run lockfile:validate",
    "lockfile:validate": "npm ls --omit=optional > /dev/null || echo 'Lock file validation complete'",

Why was this flagged?

npm lifecycle scripts like postinstall run automatically during package installation with no user interaction required. This is the #1 attack vector for malicious npm packages — attackers embed data theft or backdoor installation in these hooks. Rated CRITICAL because code executes before the developer can review it.

Badge

Markdown

[![Sigil Scan](https://sigilsec.ai/badge/github/chrisleekr/langchain-playground)](https://sigilsec.ai/scans/0E04993A-AAB4-4873-A822-27E0834635D9)

HTML

<a href="https://sigilsec.ai/scans/0E04993A-AAB4-4873-A822-27E0834635D9"><img src="https://sigilsec.ai/badge/github/chrisleekr/langchain-playground" alt="Sigil Scan"></a>

Run This Scan Yourself