~ 4 min read

Use Snyk to find and fix vulnerabilities in your dependencies

Snyk scans your dependencies for known vulnerabilities and suggests fixes.


Snyk scans and monitors your projects for security vulnerabilities.

What is Snyk?

snyk.io is a developer-first cloud-native security tool. It covers multiple areas of application security:

  1. Snyk Open Source: Find and automatically fix open source vulnerabilities
  2. Snyk Code: Find and fix vulnerabilities in your application code inreal-timee
  3. Snyk Container: Find and fix vulnerabilities in container images and Kubernetes applications
  4. Snyk Infrastructure as Code: Find and fix insecure configurations in Terraform and Kubernetes code

Learn more about what Snyk can do and sign up for a free account »

What is Snyk CLI?

Snyk CLI brings the functionality of Snyk into your development workflow. It can be run locally or in your CI/CD pipeline to scan your projects for security issues.

Supported languages and tools

Snyk supports many languages and tools, including Java, .NET, JavaScript, Python, Golang, PHP, C/C++, Ruby, Scala, and more.

CLI also supports Docker scanning and Terraform, k8s, and other Infrastructure as Code files scanning

Install Snyk CLI

Snyk CLI can be installed through multiple channels.

Install with npm or Yarn

Snyk CLI is available as an npm package. If you have Node.js installed locally, you can install it by running:

npm install snyk@latest -g

or if you are using Yarn:

yarn global add snyk

More installation methods

Standalone executables (macOS, Linux, Windows)

Install with Homebrew (macOS, Linux)

Scoop (Windows)

Snyk CLI in a Docker image

Install as a part of a Snyk CLI integration

Snyk also offers many integrations into developer tooling. These integrations will install and manage the Snyk CLI for you. For example:

Getting started with Snyk CLI

Once you installed the Snyk CLI, you can verify it’s working by running:

snyk --help

See the full Snyk CLI help.

Authenticating Snyk CLI

Snyk CLI depends on Snyk.io APIs. Connect your Snyk CLI with Snyk.io by running:

snyk auth

Setting up language support

Depending on your project’s language, you might need to setup your language environment before using Snyk.

Scanning your project

If you are already in a folder with a supported project, start by running:

snyk test

Or scan a Docker image by its tag with Snyk Container:

snyk container test ubuntu:18.04

Or a k8s file:

snyk iac test /path/to/kubernetes_file.yaml

Monitoring your project

Snyk can also monitor your project periodically and alert you for new vulnerabilities. The snyk monitor is similar to snyk test and can be used to create a project on the Snyk website that will be continuously monitored for new vulnerabilities.

snyk monitor
Monitoring /project (project-name)...

Explore this snapshot at https://app.snyk.io/org/my-org/project/29361c2c-9005-4692-8df4-88f1c040fa7c/history/e1c994b3-de5d-482b-9281-eab4236c851e

Notifications about newly disclosed issues related to these dependencies will be emailed to you.

Add Snyk to your CI/CD

Snyk is really powerful when you are continuously scanning and monitoring your projects for vulnerabilities.

Use one of our integrations to stay secure.

You can authorize Snyk CLI in your CI/CD programatically:

Using a SNYK_TOKEN envvar (preferred)


Or using a Snyk auth command

snyk auth <SNYK_API_TOKEN>
snyk test

More flags and options to try

Here are some flags that you might find useful:

  • --severity-threshold=low|medium|high|critical

    Only report vulnerabilities of provided level or higher.

  • --json

    Prints results in JSON format.

  • --all-projects

    Auto-detect all projects in working directory

See all the available commands and options by running --help:

snyk --help
 or get help for a specific command like
snyk iac --help
snyk code --help