CVE-2026-86889

🔶 medium

Summary

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.

CVSS Score

4.8

Medium

EPSS Score

0.2

Exploit Probability

Published Date

2026-09-14

First Seen: 2026-09-16

📊 Relative Risk Intelligence

This CVE is Lower Risk - more severe than 13.5% of all 358,566 vulnerabilities in our database.

#310,225

Below average severity

Severity Percentile

🎯 CISA SSVC Assessment Updated: Sep 15, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

Requires human interaction

💥 Technical Impact

Partial

Limited system impact

SSVC data provided by CISA

Last Modified 2026-09-16

Source NVD 🔗

CVSS Vector 3.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

CWE IDs (Weakness Types)

CWE-295

📦 Affected Products 2

Vendor	Product	Status	Affected Versions
apple	macos	Affected	> 15.0 < 15.8
apple	macos	Affected	> 26.0 < 26.7

🔗 References 3

https://support.apple.com/en-us/149035

Vendor Advisory

https://support.apple.com/en-us/149042

Vendor Advisory

https://support.apple.com/en-us/149043

Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-28933	🔶 medium	5.5	0.2	A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Sequoia 15.7.8, macOS...	2026-09-14
CVE-2026-28934	🔶 medium	6.5	0.3	A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoi...	2026-09-14
CVE-2026-43664	🔶 medium	5.5	0.2	This issue was addressed with improved data protection. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPad...	2026-09-14
CVE-2026-43677	🔶 medium	6.5	0.3	An out-of-bounds write issue was addressed by removing the vulnerable code. This issue is fixed in macOS Golden Gate 27,...	2026-09-14
CVE-2026-43684	⚠️ high	7.8	0.2	A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 26.7 and iPadOS 26.7, m...	2026-09-14
CVE-2026-43686	⚠️ high	8.8	0.4	A use-after-free issue was addressed with improved memory management. This issue is fixed in iOS 26.7 and iPadOS 26.7, i...	2026-09-14

These CVEs affect the same products