CVE-2026-43818highCWE-190

CVE-2026-43818: high-severity vulnerability in Apple macOS

Published 27 Jul 2026 · Updated 17 Aug 2026

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21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 8.8epss 0.5%

An integer overflow was addressed with improved input validation. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, 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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Apple · iOS and iPadOS Apple · macOS

Related CVEs — Apple macOS

In the same product, most dangerous first.

CVE-2021-30860HIGHCVE-2021-30860EPSS 76.0%KEV CVE-2021-30657MEDIUMCVE-2021-30657EPSS 68.5%KEV CVE-2025-43300CRITICALCVE-2025-43300EPSS 65.2%KEV CVE-2023-41064HIGHCVE-2023-41064EPSS 53.4%KEV CVE-2023-32434HIGHCVE-2023-32434EPSS 51.5%KEV CVE-2021-30807HIGHCVE-2021-30807EPSS 28.8%KEV

References

https://support.apple.com/en-us/128066 https://support.apple.com/en-us/128067 https://support.apple.com/en-us/128071 https://support.apple.com/en-us/128072 https://support.apple.com/en-us/148287