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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

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

Google security patch release for CVE-2026-10881

Security Patch Release
H score26 First: 06.06.2026 10:28 Last: 06.06.2026 10:28 Sources 1

About this happening: Google shipped **Chrome 149** with patches for **429 security bugs**, including **CVE-2026-10881** in **ANGLE**, creating a broad browser update for users on **Linux, Windows, and...

Open Happening

Timeline

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