AI and data stack advisories

Severe, 6 weeks1496Projects326

1496 severe, 6 weeks · 326 projects

AppleCVE-2026-86889

Apple macOS: improper certificate validation

Apple

CVE-2026-86889 · Published Sep 14, 2026 · updated Sep 16, 2026

Medium4.8
Fix: upgrade to 15.8 or later (3 fixed versions below)
Apple advisory

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 versions

PackageAffectedFixed in
macOS
Product
< 15.815.8
< 26.726.7
< 2727
Details and references
CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Severity from
CISA (its enrichment of the CVE record)
Weakness
CWE-295

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