CVE-2026-43656
Received Received - Intake
Out-of-Bounds Write in Apple iOS and macOS

Publication date: 2026-05-11

Last updated on: 2026-05-11

Assigner: Apple Inc.

Description
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. Parsing a maliciously crafted file may lead to an unexpected app termination.
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Meta Information
Published
2026-05-11
Last Modified
2026-05-11
Generated
2026-06-21
AI Q&A
2026-05-12
EPSS Evaluated
2026-06-20
NVD
CVE-2026-43656
Affected Vendors & Products
Showing 7 associated CPEs
Vendor Product Version / Range
apple ios 18.7.9
apple ipados 18.7.9
apple ios 26.5
apple ipados 26.5
apple macos_sequoia 15.7.7
apple macos_sonoma 14.8.7
apple macos_tahoe 26.5
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is an out-of-bounds write issue that occurs due to insufficient input validation when parsing files. A specially crafted malicious file can trigger this flaw, potentially causing an application to terminate unexpectedly.

Mitigation Strategies

To mitigate this vulnerability, update your Apple devices to the fixed versions: iOS 18.7.9, iPadOS 18.7.9, iOS 26.5, iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, or macOS Tahoe 26.5.

Impact Analysis

The primary impact of this vulnerability is that parsing a maliciously crafted file may cause an application to crash unexpectedly. This could lead to denial of service or disruption of normal application functionality.

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