Node.js itself is licensed under an MIT style permissive license, so using the runtime brings little licensing burden. The larger risks are in the npm packages you add, each with its own license, and in the security patching of the runtime and those packages. Track both with an inventory.
What license covers Node.js?
The LICENSE file in the Node.js repository says the main license is MIT style, held by Node.js contributors, and applies to everything that is not an externally maintained library. The same file then lists the licenses of bundled components. Examples include MIT for libuv, llhttp and undici, Apache License 2.0 for OpenSSL, a Unicode license for ICU, and V8 under its own BSD style terms.
The practical reading: the runtime is permissive, and the notices of bundled parts travel with it. If you redistribute Node.js, for example inside a container image or a desktop application, keep the license text with it. This is not legal advice, so ask counsel about your own distribution.
Where does licensing risk actually come from?
From npm packages. A typical application has a handful of direct dependencies and hundreds of indirect ones, and each carries a license that you accept by shipping it. Most are permissive, but a few are not, and some packages have no declared license at all. A missing license means you have no clear permission to use the code.
The cases worth catching: a copyleft license pulled into a product you distribute, a package that changed license between versions, and a dependency with no license field.
What are the security risks?
Runtime vulnerabilities. The Node.js project runs a documented process. Reports go through its HackerOne program, with acknowledgment promised within 5 days and a more detailed response within 10. Fixes are prepared for all supported lines and held until an embargo date, typically 72 hours after a CVE is issued, and the advisory then appears on the project blog. Running a release line that is out of support means those fixes never reach you.
Package vulnerabilities. The project's policy states that flaws in third party modules go to those modules' maintainers. Node.js does not patch your dependencies. You must.
Malicious packages. Typosquatted names and hijacked maintainer accounts can put hostile code into a build. Install scripts run with the privileges of the person or pipeline doing the install.
Constructed example: a quiet license change
A team ships a command line tool built with Node.js. A transitive dependency is upgraded by an automatic update, and the new version carries a stricter license than the old one. Nobody reads the diff, since the version number moved by a patch. The change surfaces during a customer's due diligence. Had the build produced a license report and failed on unexpected changes, the issue would have shown at the pull request.
The example is invented, but it shows why license checks belong in the pipeline.
How do you handle both together?
Generate a software bill of materials on every build. It gives you one list that serves licensing review, vulnerability matching and incident response. Safeguard's dependency scanning builds the inventory and matches it to known vulnerabilities, and its free in-browser scan at gold.safeguard.sh/scan checks up to 100 dependencies if you want to see your own tree.
How to check or apply this
- Pin the Node.js release line to one that is still supported and subscribe to the project's security announcements.
- Commit a lockfile and install from it in CI.
- Generate an SBOM for each build and store it.
- Define allowed, review and blocked license lists with legal.
- Fail the build on a missing license or a change in license class.
- Scan dependencies for known vulnerabilities and fix by reachability and exploitation evidence.
- Review install scripts for new dependencies, and disable them where you can.
Quick check
Do I need to publish my source code because I use Node.js?
No. The runtime's MIT style license does not require that. Licenses of individual npm packages vary, so check those.
Who fixes vulnerabilities in my npm dependencies?
The package maintainers publish fixes. You are responsible for upgrading. The Node.js project directs reports about third party modules to their maintainers.
Sources
Last reviewed: 18 October 2026.
