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The Polyfill Supply Chain Attack: A Cautionary Tale
Supply chain security has long been an overlooked aspect of cybersecurity, with many users simply trusting the software they use without much scrutiny. However, the recent "Polyfill" or "Polykill" attack has shone a spotlight on the widespread and devastating nature of supply chain vulnerabilities.
The Polyfill library was a widely-used JavaScript tool that helped ensure modern web features worked across older browsers. Hosted on the polyfill.io domain, this library was integrated into the code of over 100,000 websites. But unbeknownst to most, the polyfill.io domain was recently acquired by a Chinese company, who then proceeded to inject malicious, obfuscated code into the library.