Node.js security covers vulnerabilities, dependency risks, and runtime defenses that can affect server-side applications and their data.
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Background for this topic.
Node.js is an open-source, cross-platform runtime that executes JavaScript outside a web browser, using Google’s V8 engine. Its event-driven, non-blocking input/output model is widely used for web servers, APIs, command-line tools, and backend services. The runtime is not itself an application framework; security outcomes depend substantially on the code and modules running within it.
Security concerns include vulnerabilities in the Node.js runtime, insecure application logic such as injection or server-side request forgery, and risks from the large npm dependency ecosystem. Malicious or compromised packages, unsafe install scripts, transitive dependencies, and prototype-pollution flaws can expand an application’s attack surface. Practitioners should track runtime and package advisories, use lockfiles and dependency review, restrict package-install and process permissions where practical, validate untrusted input, and protect credentials and session data. During incidents, dependency inventories and build records help determine whether a vulnerable module or runtime was deployed.
A new supply chain attack targets Ethereum tools, exploiting npm packages to steal sensitive data
Cybersecurity researchers have revealed several malicious packages on the npm registry that have been found impersonating the Nomic Foundation's Hardhat tool in order to steal sensitive data from developer systems