CVE-2026-43779
A logic flaw in macOS lets an application intercept network connections that are meant for other processes. The flaw can be exploited without any special permissions or user interaction. Apple has released patches in recent macOS releases to fix the issue.
An official fix is available, so this entry is kept for 30 days and then removed automatically.
Who is affected
Apple macOS – Sequoia 15.7.8, Sonoma 14.8.8, Tahoe 26.6 and earlier versions.
Real-world impact
An attacker could hijack or eavesdrop on network traffic intended for other applications, potentially stealing data or injecting malicious content.
Why this severity
The CVSS score of 9.8 reflects that the vulnerability is exploitable over the network, requires no authentication, and can compromise confidentiality, integrity, and availability of all processes on the affected system.
What to do about it
- 01Upgrade macOS to the latest version (Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6) or later.
NVD-referenced vendor advisory
Timeline
- Jul 27, 2026 · 3d agoPublishedDisclosed and added to the National Vulnerability Database.
- Jul 28, 2026 · 2d agoOfficial fix availableA vendor patch or mitigation now exists — see the remediation steps above.
How it’s attacked
References & advisories
- support.apple.com/en-us/128067release notesvendor advisory
- support.apple.com/en-us/128071release notesvendor advisory
- support.apple.com/en-us/128072release notesvendor advisory