Safari bug can leak some of your Google account info and recent browsing history
A serious Safari bug can disclose information about your recent browsing history and even some info of the logged-in Google account.
A bug in Safari’s IndexedDB implementation on Mac and iOS means that a website can see the names of databases for any domain, not just its own. The database names can then be used to extract identifying information from a lookup table.
Using the exploit, a nefarious site could scrape your Google User ID and then use that ID to find out other personal information about you, as the ID is used to make API requests to Google services.
Source: Safari bug can leak some of your Google account info and recent browsing history – 9to5Mac