CVE-2026-43734

Analyzed Analyzed - Analysis Complete

Use-After-Free in Safari with Malicious Web Content

Publication date: 2026-06-29

Last updated on: 2026-06-30

Assigner: Apple Inc.

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected process crash.

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

2026-07-19

NVD

CVE-2026-43734

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	From 26.0 (inc) to 26.5.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a use-after-free issue in Apple software such as Safari, iOS, iPadOS, and macOS Tahoe. It occurs when the system improperly manages memory, leading to the possibility of accessing memory that has already been freed.

Processing maliciously crafted web content exploiting this issue may cause an unexpected process crash.

Impact Analysis

The primary impact of this vulnerability is that processing specially crafted web content can cause an unexpected crash of the affected process, potentially disrupting normal operation.

Compliance Impact

The vulnerability described is a use-after-free issue that may lead to an unexpected process crash when processing maliciously crafted web content. There is no information provided about any impact on data confidentiality, integrity, or privacy that would directly affect compliance with standards such as GDPR or HIPAA.

Since the CVE description does not mention any data breach, unauthorized access, or exposure of personal or sensitive information, it is not possible to determine from the provided information how this vulnerability affects compliance with common standards and regulations.

Mitigation Strategies

To mitigate this vulnerability, update affected Apple products to version 26.5.2 or later. This includes Safari, iOS, iPadOS, and macOS Tahoe.

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