The Great NPM Heist: Supply Chain Attack Shakes the JavaScript World
Attack on the Heart of the JavaScript Ecosystem
The developer world was shaken by the news of a brazen supply chain attack on the NPM repository – the heart of the JavaScript ecosystem. On September 8, 2025, a group of attackers seized control of over 18 core libraries, each with millions, and collectively totaling over 2 billion weekly downloads. This is one of the largest and potentially most devastating attacks of its kind in history.
How Did It Happen? The Target: Crypto Wallets
All indications are that the attackers used phishing to take over the accounts of developers responsible for the popular packages. After gaining access, they injected malicious code snippets into the libraries with one primary goal: stealing cryptocurrency. The modified code was designed to search for and drain cryptocurrency wallets on infected machines.
This is a classic example of a supply chain attack – instead of attacking thousands of targets individually, the hackers hit a single, common source from which millions download software. Imagine someone poisoning the main water supply instead of running around the city with a bottle of poison. The scale of the impact is incomparable.
The Response and What's Next?
The developer community and security teams responded swiftly, removing the infected versions of the packages. However, this incident is a brutal reminder of the fragility of the open-source ecosystems that underpin today's digital world. The situation is still unfolding, and the full extent of the damage is still being assessed. One thing is certain – the discussion about security in NPM and similar repositories will flare up again. Sometimes, it takes a small fire for everyone to remember the safety regulations.
Source: breached.company
Related articles: Supply chain attacks are becoming increasingly common – a similar scenario occurred during the cyberattack on European airports, where an attack on a software provider paralyzed half of Europe. Also read about the NIS2 Directive, which requires supply chain security in critical infrastructure.
About the Author

Dyrektor ds. Technologii w SecurHub.pl
Doktorant z zakresu neuronauki poznawczej. Psycholog i ekspert IT specjalizujący się w cyberbezpieczeństwie.
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