CVE-2026-86871 is a vulnerability in Apple macOS
Published on October 20, 2026
An integer underflow was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker with control of a network file server may be able to cause unexpected system termination.
Products Associated with CVE-2026-86871
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Affected Versions
Apple macOS:- Before 15.8 is affected.
- Before 26.7 is affected.
- Before 27 is affected.