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Apple releases first background security improvements update to fix WebKit vulnerability

Apple has introduced its first Background Security Improvements update to address a critical WebKit vulnerability (CVE-2026-20643) affecting iOS, iPadOS, and macOS. This flaw allowed malicious websites to bypass the same-origin policy, potentially accessing data from other sites.

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  • Apple pushes first Background Security Improvements update to fix WebKit flaw...
    bleepingcomputer.com
  • Apple security advisory (AV26-248)
    Canadian Centre for Cyber Security - Alerts
  • Apple Debuts Background Security Improvements With Fresh WebKit Patches
    SecurityWeek
  • Apple patches WebKit bug that could let sites access your data
    Malwarebytes Threat Analysis
  • Apple starts issuing lightweight security updates between software releases
    Help Net Security