CVE-2026-20643

CVE

Threat entity extracted from intelligence sources

Frequency

6

occurrences

First Seen

March 17, 2026

Last Seen

March 18, 2026

Exploited in Wild

—

Ransomware Use

—

Public Exploits

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Attack Vector

—

Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Apple Releases Background Security Improvement for WebKit Flaw CVE-2026-2064357.8

On March 17, 2026, Apple released its first Background Security Improvement to address a critical WebKit vulnerability tracked as CVE-2026-20643. This flaw could allow malicious web content to bypass the Same Origin Policy, potentially exposing user data across different sites. The update applies to...

Public Exploits

Checking GitHub for proof-of-concept code…

Related Clusters (1)

Apple Releases Background Security Improvement for WebKit Flaw CVE-2026-20643

Mar 17·22 sources

Related Articles (6)

Apple rolls out 'Background Security Improvements' for WebKit browser engine bug

Scworld·Mar 18

Apple Debuts 'Background Security Improvements' with WebKit Fix

Bitdefender·Mar 18

Apple Fixes WebKit Vulnerability Enabling Same

Thehackernews·Mar 18

Apple pushes first Background Security Improvements update to fix WebKit flaw

Bleepingcomputer·Mar 18

Apple Relaunches Background Security Improvements with WebKit Patch

Tidbits·Mar 17

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Related Entities

Apple Mail IOS MacOS WebKit IPadOS Safari IPad IPhone App Store