CVE-2026-43708

Analyzed Analyzed - Analysis Complete

Safari 26.5.2 Cross-Origin Data Exfiltration Vulnerability

Publication date: 2026-06-29

Last updated on: 2026-06-30

Assigner: Apple Inc.

Description

The issue was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious website may exfiltrate data cross-origin.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-06-29

Last Modified

2026-06-30

Generated

2026-07-20

AI Q&A

2026-06-29

EPSS Evaluated

2026-07-18

NVD

CVE-2026-43708

Affected Vendors & Products

Vendor	Product	Version / Range
apple	safari	to 26.5.2 (exc)
apple	ipados	to 26.5.2 (exc)
apple	iphone_os	to 26.5.2 (exc)
apple	macos	to 26.5.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves insufficient input validation in certain Apple products, including Safari, iOS, iPadOS, and macOS Tahoe. Because of this flaw, a malicious website could potentially exfiltrate data across origins, meaning it could access data from other websites or sources that should be protected.

Impact Analysis

The impact of this vulnerability is that a malicious website could steal or exfiltrate sensitive data from your browser or device by bypassing normal security boundaries between websites. This could lead to unauthorized access to personal or confidential information.

Compliance Impact

This vulnerability allows a malicious website to exfiltrate data cross-origin due to insufficient input validation.

Such unauthorized data exfiltration could potentially lead to violations of data protection regulations like GDPR and HIPAA, which require safeguarding personal and sensitive information against unauthorized access and disclosure.

However, the specific impact on compliance depends on the context of data involved and the affected environment.

Mitigation Strategies

To mitigate this vulnerability, update your Apple Safari, iOS, iPadOS, or macOS Tahoe to version 26.5.2 or later, where the issue has been fixed with improved input validation.

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