Medium severity4.8NVD Advisory· Published Sep 14, 2026· Updated Sep 16, 2026
CVE-2026-86889
CVE-2026-86889
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
2(expand)+ 1 more
- (no CPE)
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*range: >=15.0,<15.8
Patches
Vulnerability mechanics
References
3- support.apple.com/en-us/149035nvdVendor Advisory
- support.apple.com/en-us/149042nvdVendor Advisory
- support.apple.com/en-us/149043nvdVendor Advisory
News mentions
2- Apple macOS: 25 Vulnerabilities Patched in Same-Day Security UpdateVypr Intelligence · Sep 14, 2026
- Apple Updates Everything, (Mon, Sep 14th)SANS Internet Storm Center · Sep 14, 2026