CVE-2026-64783

Analyzed Analyzed - Analysis Complete

Use-After-Free in Safari with Malicious Web Content

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.6, iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected Safari crash.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-27

Last Modified

2026-07-28

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-64783

EUVD

EUVD-2026-49451

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	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-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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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 is a use-after-free vulnerability caused by improper memory management. It occurs when a program continues to use memory after it has been freed, potentially leading to crashes or unexpected behavior. In this case, processing malicious web content could trigger the issue.

Detection Guidance

This vulnerability is specific to Apple software versions before Safari 26.6, iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, and watchOS 26.6. Detection involves checking installed software versions against these patched releases.

Impact Analysis

The vulnerability may cause Safari or other affected Apple software to crash unexpectedly when processing malicious web content. This could disrupt normal use of the browser or device until the software is updated.

Compliance Impact

The provided CVE data does not specify how this vulnerability impacts compliance with standards like GDPR or HIPAA. The issue involves a use-after-free flaw leading to potential Safari crashes, but no direct compliance implications are mentioned.

Mitigation Strategies

Update affected Apple products to the fixed versions: Safari 26.6, iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, visionOS 26.6, or watchOS 26.6. Disable automatic loading of web content if possible until updates are applied.

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