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7.5 High

CVE-2026-20639 An integer overflow was addressed with improved input validation

Description

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

Affected products and versions

Product Affected versions Fixed in
macOS 26.3 earliest → < 26.3 26.3
macOS 15.7 earliest → < 15.7.5 15.7.5
macOS 14.8 earliest → < 14.8.5 14.8.5

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