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SecurityCritical

polyfill.io script

The polyfill.io domain was taken over and served malicious code in 2024.

<0.1%of Global websites

By market

  1. Global<0.1%
  2. United Kingdom0.2%
  3. Netherlands0.1%
  4. Italy<0.1%
  5. Spain<0.1%
  6. Japan<0.1%
  7. Latin America<0.1%

How to fix

  1. 1Remove the polyfill.io script tag.
  2. 2Self-host the polyfills you need or use a trusted mirror.

Our crawler: 68,769 sites · Global · updated Oct 23, 2026 · Methodology

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