CVE-2026-86889 Security feature bypass in macOS
An attacker in a privileged network position can intercept network traffic due to a certificate validation flaw in macOS.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86889?
CVE-2026-86889 is a medium-severity vulnerability in Apple Macos, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-295
Which versions are affected by CVE-2026-86889?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2026-86889?
No fix has been published for CVE-2026-86889 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-86889 being exploited?
There is no known exploitation of CVE-2026-86889 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-6fvx-gp4r-8x93.