https://pwn.watch/t/polyfill Live security incidents worldwide: CVEs, patch status, fixed versions, advisories and the posts that broke them. en Thu, 27 Jun 2024 00:00:00 GMT https://pwn.watch/i/polyfill-io-supply-chain-attack https://pwn.watch/i/polyfill-io-supply-chain-attack Thu, 27 Jun 2024 00:00:00 GMT high <p>The polyfill.io domain and GitHub account were bought in February 2024 by a Chinese company. The CDN, embedded via cdn.polyfill.io on more than 100,000 sites, then served malicious JavaScript that redirected some mobile visitors to a sports betting site. Sansec exposed it on 2024-06-25. Cloudflare began rewriting polyfill.io links to its own mirror, and Namecheap put the domain on hold.</p> <p><strong>Status:</strong> closed · <strong>Patch:</strong> patched · <strong>Fixed in:</strong> Remove polyfill.io references or switch to the Cloudflare/Fastly mirrors</p> <p><strong>Latest updates:</strong></p><ul><li>2024-06-27: Cloudflare rewrites cdn.polyfill.io to its mirror; Namecheap puts the domain on hold (<a href="https://sansec.io/research/polyfill-supply-chain-attack">source</a>)</li><li>2024-06-25: Sansec reports the polyfill.io supply-chain attack hitting 100k+ sites (<a href="https://sansec.io/research/polyfill-supply-chain-attack">source</a>)</li></ul>