CVE-2026-43818

Analyzed Analyzed - Analysis Complete

Integer Overflow in iOS and macOS Image Processing

Publication date: 2026-07-27

Last updated on: 2026-07-29

Assigner: Apple Inc.

Description

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Processing a maliciously crafted image may lead to arbitrary code execution.

CVSS Scores

EPSS Scores

Probability:
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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-2026-43818

EUVD

EUVD-2026-49544

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 14.0 (inc) to 14.8.8 (exc)
apple	macos	From 15.0 (inc) to 15.7.8 (exc)
apple	macos	From 26.0 (inc) to 26.6 (exc)
apple	ipados	to 26.6 (exc)
apple	iphone_os	to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow caused by insufficient input validation. When processing a specially crafted image, the flaw may allow arbitrary code execution on affected devices.

Detection Guidance

This vulnerability involves an integer overflow in image processing. Detection requires checking if your system runs affected versions of iOS, iPadOS, or macOS. Update to the patched versions (iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6) to mitigate the issue.

Impact Analysis

If exploited, this vulnerability could let attackers run malicious code on your device by tricking you into opening a maliciously crafted image. This could lead to unauthorized access or control of your device.

Compliance Impact

The provided CVE data does not specify direct impacts on compliance with standards like GDPR or HIPAA. The vulnerability involves an integer overflow leading to arbitrary code execution via maliciously crafted images, which could potentially compromise data integrity or confidentiality. However, explicit compliance implications are not detailed in the given context.

Mitigation Strategies

Update affected systems to the latest patched versions: iOS 26.6 or later, iPadOS 26.6 or later, macOS Sequoia 15.7.8 or later, macOS Sonoma 14.8.8 or later, and macOS Tahoe 26.6 or later. Avoid processing untrusted or maliciously crafted images until updates are applied.

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