CVE-2026-86889
MEDIUMCVSS 4.8/10EPSS 0.12%
Last modified
CVE-2026-86889 is a medium-severity vulnerability rated 4.8/10 on the CVSS scale. 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. EPSS estimates a 0.12% chance of exploitation in the next 30 days.
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.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apple | Macos | >= 15.0, < 15.8 |
| Apple | Macos | >= 26.0, < 26.7 |
References
- https://support.apple.com/en-us/149035Vendor Advisory
- https://support.apple.com/en-us/149042Vendor Advisory
- https://support.apple.com/en-us/149043Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-86889?
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.
How severe is CVE-2026-86889?
CVE-2026-86889 has a CVSS score of 4.8/10 (MEDIUM severity). The EPSS model estimates a 0.12% probability of exploitation in the next 30 days.
How do I fix CVE-2026-86889?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-86889?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST
