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4.8 Medium

CVE-2026-86889 A certificate validation issue was addressed with improved certificate validation

Description

A certificate validation issue was addressed with improved certificate validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker in a privileged network position may be able to intercept network traffic.

Affected products and versions

Product Affected versions Fixed in
macOS 27 earliest → < 27 27
macOS 26.7 earliest → < 26.7 26.7
macOS 15.8 earliest → < 15.8 15.8

Other CVEs of macOS

The 3813 CVEs of macOS →
CVE-2026-86925 An authorization issue was addressed with improved state management 5.5 Medium CVE-2026-84627 A buffer overflow was addressed with improved bounds checking 7.8 High CVE-2026-113945 An out-of-bounds read was addressed with improved bounds checking 5.5 Medium CVE-2026-65327 A logic issue was addressed with improved checks 8.4 High
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