CVE-2026-43821

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Sandbox Escape in Apple Safari and iOS

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

An access issue was addressed with improved access restrictions. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, watchOS 26.6. An app may be able to read files outside of its sandbox.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-27

Last Modified

2026-07-29

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-43821

EUVD

EUVD-2026-49529

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 26.0 (inc) to 26.6 (exc)
apple	ipados	to 26.6 (exc)
apple	iphone_os	to 26.6 (exc)
apple	tvos	to 26.6 (exc)
apple	visionos	to 26.6 (exc)
apple	safari	to 26.6 (exc)
apple	watchos	to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability is an access issue where an app may be able to read files outside of its sandbox due to insufficient access restrictions. It was addressed in multiple Apple operating systems and Safari versions.

Detection Guidance

This vulnerability is specific to Apple software and involves sandbox bypass. Detection requires checking installed Apple software versions. For Safari, use 'defaults read /Applications/Safari.app/Contents/Info.plist CFBundleVersion'. For iOS/iPadOS, check Settings > General > About > Version. For macOS, use 'sw_vers -productVersion'. For other Apple OS versions, check their respective update mechanisms.

Impact Analysis

An attacker could exploit this to access sensitive files on your device that should be restricted. This could lead to unauthorized data exposure or privacy breaches if malicious apps are installed.

Compliance Impact

This vulnerability could lead to unauthorized data access, potentially violating GDPR (data protection) or HIPAA (health information privacy) by exposing sensitive user data.

Mitigation Strategies

Update affected Apple products to the latest versions: Safari 26.6, iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, or watchOS 26.6. This addresses the access issue by applying improved restrictions.

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