Security issue affecting your landing pages

Technical Q&A

Topic summary

A user received a security warning from Google about potentially compromised third-party libraries (polyfill.io, bootcss.com, etc.) that could redirect visitors from their website without authorization.

Key Issue:

  • The affected user cannot locate the problematic code in their Shopify store
  • They’re unsure how to resolve the security vulnerability
  • Shopify support appears unhelpful in addressing this issue

Recommended Action:

  • Check website code (or have a website administrator review it) to identify any compromised libraries

Status: Another user directed them to an existing community thread for more detailed information and guidance on resolving this security issue.

Summarized with AI on November 8. AI used: claude-sonnet-4-5-20250929.
1

I have had an email from Google stating:

detected a security issue that may be affecting websites using specific third-party libraries (like polyfill.io, bootcss.com, and others). This issue can sometimes redirect visitors away from the intended website without the website owner’s knowledge or permission.
Check your website’s code (or ask your website administrator) to see if you’re using any compromised libraries.

Any idea how to fix - I can’t even seem to find the code.
Clueless on how to resolve this & Shopify support is useless!

2

Hi @Resolute , for more detail please review this thread.