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Apple Background Security Improvements WebKit patch (CVE-2026-20643)

Security Patch Release
First reported
Last updated
Happening score
H score 37
2 unique sources, 2 articles

Summary

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Apple's first Background Security Improvements release patches CVE-2026-20643 in WebKit, letting iPhones, iPads, and Macs get a security fix without a full OS upgrade. The out-of-band update closes a cross-origin flaw that could let malicious web content bypass the browser's Same Origin Policy. It is available on iOS 26.3.1, iPadOS 26.3.1, macOS 26.3.1, and macOS 26.3.2.

Related Happenings

Mozilla Firefox 152.0.6 security update (CVE-2026-15718, CVE-2026-15719)

Security Patch Release
H score41 First: 15.07.2026 16:18 Last: 15.07.2026 16:18 Sources 1

About this happening: Mozilla's Firefox 152.0.6 update fixes two critical flaws after exploit code was published, reducing risk for users running unpatched browsers. The release remediates...

Open Happening

Apple iOS, macOS, and Safari security updates (multiple vulnerabilities)

Security Patch Release
H score33 First: 30.06.2026 10:15 Last: 30.06.2026 10:15 Sources 1

About this happening: Apple released security updates for iOS, macOS, and Safari that fix over three dozen flaws, including four WebKit vulnerabilities. The update bundle covers...

Open Happening

Apple security patch release for CVE-2025-20701

Security Patch Release
H score29 First: 18.06.2026 15:23 Last: 18.06.2026 15:23 Sources 1

About this happening: Apple released Beats Firmware Update 1B211 for Beats Studio Buds to fix CVE-2025-20701, closing a Bluetooth flaw that could let nearby attackers spy on conversations....

Open Happening

Google security patch release for CVE-2026-11645

Security Patch Release
H score56 First: 09.06.2026 09:56 Last: 09.06.2026 09:56 Sources 1

About this happening: Google released emergency Chrome updates to fix CVE-2026-11645, a zero-day that had already been exploited in the wild. The patched release covers Chrome Sta...

Open Happening

Apple Passwords app and Safari add Apple Intelligence-powered automatic password repair

Security Tool/Service
H score10 First: 09.06.2026 00:03 Last: 09.06.2026 00:03 Sources 1

About this happening: Apple Passwords app and Safari are adding an Apple Intelligence feature that can automatically repair weak or compromised passwords, reducing password-hygiene risk for...

Open Happening

Timeline

  1. 18.03.2026 03:06 3 articles · 4mo ago

    Apple releases first Background Security Improvements fix for CVE-2026-20643

    Initial Disclosure

    Apple releases its first Background Security Improvements update for iPhones, iPads, and Macs to fix CVE-2026-20643 in WebKit, a cross-origin issue in the Navigation API that could let malicious web content bypass the browser's Same Origin Policy. The update is available on iOS 26.3.1, iPadOS 26.3.1, macOS 26.3.1, and macOS 26.3.2, and the flaw was discovered by security researcher Thomas Espach.

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  2. 18.03.2026 03:06 3 articles · 4mo ago

    Apple releases first Background Security Improvements fix for CVE-2026-20643

    Initial Disclosure

    Apple releases its first Background Security Improvements update for iPhones, iPads, and Macs to fix CVE-2026-20643 in WebKit, a cross-origin issue in the Navigation API that could let malicious web content bypass the browser's Same Origin Policy. The update is available on iOS 26.3.1, iPadOS 26.3.1, macOS 26.3.1, and macOS 26.3.2, and the flaw was discovered by security researcher Thomas Espach.

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