Security | Threat Detection | Cyberattacks | DevSecOps | Compliance

How Cloudflare's client-side security made the npm supply chain attack a non-event

In early September 2025, attackers used a phishing email to compromise one or more trusted maintainer accounts on npm. They used this to publish malicious releases of 18 widely used npm packages (for example chalk, debug, ansi-styles) that account for more than 2 billion downloads per week. Websites and applications that used these compromised packages were vulnerable to hackers stealing crypto assets (“crypto stealing” or “wallet draining”) from end users.

Improving the trustworthiness of Javascript on the Web

The web is the most powerful application platform in existence. As long as you have the right API, you can safely run anything you want in a browser. Well… anything but cryptography. It is as true today as it was in 2011 that Javascript cryptography is Considered Harmful. The main problem is code distribution. Consider an end-to-end-encrypted messaging web application.

Introducing REACT: Why We Built an Elite Incident Response Team

Cloudforce One’s mission is to help defend the Internet. In Q2’25 alone, Cloudflare stopped an average of 190 billion cyber threats every single day. But real-world customer experiences showed us that stopping attacks at the edge isn’t always enough. We saw ransomware disrupt financial operations, data breaches cripple real estate firms, and misconfigurations cause major data losses. In each case, the real damage occurred inside networks.

Cloudflare just got faster and more secure, powered by Rust

Cloudflare is relentless about building and running the world’s fastest network. We have been tracking and reporting on our network performance since 2021: you can see the latest update here. Building the fastest network requires work in many areas. We invest a lot of time in our hardware, to have efficient and fast machines. We invest in peering arrangements, to make sure we can talk to every part of the Internet with minimal delay.

Introducing Observatory and Smart Shield - see how the world sees your website, and make it faster in one click

Modern users expect instant, reliable web experiences. When your application is slow, they don’t just complain — they leave. Even delays as small as 100 ms have been shown to have a measurable impact on revenue, conversions, bounce rate, engagement and more.

Giving users choice with Cloudflare's new Content Signals Policy

If we want to keep the web open and thriving, we need more tools to express how content creators want their data to be used while allowing open access. Today the tradeoff is too limited. Either website operators keep their content open to the web and risk people using it for unwanted purposes, or they move their content behind logins and limit their audience.