This issue was addressed through improved state management. This issue is fixed in iOS 26.3 and iPadOS 26.3, Safari 26.3, macOS Tahoe 26.3, visionOS 26.3. A website may be able to track users through Safari web extensions.
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"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-20676.json"