A flaw in Safari 15's IndexedDB API can leak browser activity and user identifiers, like Google ID, to other sites; Apple was alerted of the flaw on November 28 (FingerprintJS Blog)

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FingerprintJS Blog:
A flaw in Safari 15's IndexedDB API can leak browser activity and user identifiers, like Google ID, to other sites; Apple was alerted of the flaw on November 28  —  DISCLAIMER: FingerprintJS does not use this vulnerability in our products and does not provide cross-site tracking services.

from Techmeme https://ift.tt/3FwWMvF