CVE-2026-86889: An attacker in a privileged network position may be able to intercept network traffic in Apple macOS
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.
AI Analysis
Technical Summary
CVE-2026-86889 is a vulnerability in Apple macOS involving a certificate validation flaw. This flaw could enable an attacker positioned within the network to intercept network traffic by exploiting improper certificate validation. Apple addressed this issue by improving certificate validation in specific macOS releases: Golden Gate 27, Sequoia 15.8, and Tahoe 26.7.
Potential Impact
An attacker with privileged network access may be able to intercept network traffic due to the certificate validation issue. This could lead to potential exposure of sensitive data transmitted over the network if the attacker successfully exploits the vulnerability.
Mitigation Recommendations
Apple has released fixes for this vulnerability in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. Users and administrators should update to these versions or later to remediate the issue.
CVE-2026-86889: An attacker in a privileged network position may be able to intercept network traffic in Apple macOS
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 software
Apple
macOS
pkg:github/apple/macos-sequoiapkg:github/apple/macos-golden-gateRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-86889 is a vulnerability in Apple macOS involving a certificate validation flaw. This flaw could enable an attacker positioned within the network to intercept network traffic by exploiting improper certificate validation. Apple addressed this issue by improving certificate validation in specific macOS releases: Golden Gate 27, Sequoia 15.8, and Tahoe 26.7.
Potential Impact
An attacker with privileged network access may be able to intercept network traffic due to the certificate validation issue. This could lead to potential exposure of sensitive data transmitted over the network if the attacker successfully exploits the vulnerability.
Mitigation Recommendations
Apple has released fixes for this vulnerability in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. Users and administrators should update to these versions or later to remediate the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apple
- Date Reserved
- 2026-09-08T16:43:41.872Z
- State
- PUBLISHED
Threat ID: 6aa8611855bf5e2cf59d304f
Added to database: 09/14/2026, 21:03:20 UTC
Last enriched: 09/14/2026, 21:18:02 UTC
Last updated: 09/15/2026, 04:01:22 UTC
Views: 7
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