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CVE-2026-86889

MEDIUM
4.8
CVSS Score
Published: September 14, 2026 at 08:50 PM UTC
Updated: October 26, 2026 at 08:40 PM UTC
1 product affected across 1 vendormacOS

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Severity
MEDIUM4.8
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

macOS· Apple
95%
15.0 ≤ v < 15.826.0 ≤ v < 26.7
Affected range stops below 15.8, so it looks safe — our inference, not a vendor statement
Affected range stops below 26.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 27, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Vendor Advisory
Source: cverecord
https://support.apple.com/en-us/149035
Vendor Advisory
Source: cverecord
https://support.apple.com/en-us/149042
Vendor Advisory
Source: cverecord
https://support.apple.com/en-us/149043

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

4.8MEDIUM134c704f-9b21-4f2e-91b3-4a467353bcc0
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-295

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