# laverdet/isolated-vm

Secure & isolated JS environments for nodejs

Repository: https://github.com/laverdet/isolated-vm
Canonical: https://ross.abutalabs.com/products/isolated-vm
Language: C++
License: ISC
License Family: permissive
Last push: 2026-08-23T12:57:33+00:00

## Health v2 (maintenance only)
Score: 79/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 40, longevity 100
- inputs: {"age_days": 3392, "days_push": 10, "days_rel": 321, "gap_med": 78, "n_releases_24m": 6}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2906, forks 190 (observed 2026-08-28T04:07:29.089818+00:00)

## What it is
A Node.js library providing access to V8 isolates to create completely isolated JavaScript environments. It lets you run untrusted or sandboxed code free of the Node.js runtime's capabilities.

## Use cases
- run untrusted javascript code safely in nodejs
- create sandboxed js execution environments
- run user-submitted scripts in isolation
- execute plugin code without access to node runtime
- run multiple isolated javascript environments in one process

## When to choose
- you need strong isolation for executing untrusted JavaScript in Node.js
- you want per-tenant script execution with shared memory transfer controls
- you need a native V8 isolate API rather than child processes

## When to avoid
- you need a pure-JavaScript solution without native compilation
- you want a project under active feature development (it is in maintenance mode)
- you are on an odd-numbered or unsupported Node.js version

## Facets
- artifact type: library
- maturity: maintenance
- function: security, concurrency, developer-tools
- domain: developer-tools, backend, security
- platform: cpp
- tags: v8-isolates, sandboxing, javascript-sandbox, native-addon, nodejs

## Member repositories
- laverdet/isolated-vm (main) score 79

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:29.089818+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:34:27.729743+00:00, confidence not recorded.
  - readme: https://github.com/laverdet/isolated-vm (fetched 2026-08-28T04:07:29.089818+00:00, sha 4302a42bfa99)
- Data as of 2026-08-30T08:39:29.467469+00:00.