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8.1

macOS could crash or expose data from crafted file

CVE-2026-84516 · published 1 month ago
Summary

A flaw in macOS can be triggered by opening a specially made file, causing the application to stop working or reveal parts of its memory. This could let an attacker see information that should stay private. Update macOS to the latest version (Golden Gate 27, Sequoia 15.8, or Tahoe 26.7) to fix the issue.

What to do
  • Update apple macos to version 15.8 or later.
Affected software
VendorProductAffected versions
apple macos < 15.8
Original advisory text
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Processing a maliciously crafted file may resul...
An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Processing a maliciously crafted file may result in unexpected app termination or disclosure of process memory.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
8.1 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-125Out-of-bounds Read
Timeline
Published14 Sep 2026
Updated4 Nov 2026
First seen14 Sep 2026
Sources
CVE-2026-84516 · NVD
CVE-2026-84516 · MITRE
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