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EPSS 0.4%top 73%

CVE-2026-20679: Processing a maliciously crafted file may lead to unexpected app termination in Apple macOS

0
Medium
VulnerabilityCVE-2026-20679cvecve-2026-20679
Published: 08/21/2026 (08/21/2026, 00:38:59 UTC)
Source: CVE Database V5
Vendor/Project: Apple
Product: macOS

Description

CVE-2026-20679 is a medium severity vulnerability in Apple macOS where processing a maliciously crafted file may cause unexpected application termination. The issue has been addressed with improved checks and fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, and macOS Tahoe 26.4.

CVSS v3.1

Score 4.3medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Affected software

Apple

macOS

Affected versions
>=0 <14.8.5>=0 <15.7.5>=0 <26.4

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 09/11/2026, 03:33:11 UTC

Technical Analysis

This vulnerability involves improper handling of certain files in macOS that can lead to unexpected app termination when a maliciously crafted file is processed. The issue relates to memory safety weaknesses (CWE-125: Out-of-bounds Read, CWE-416: Use After Free). Apple fixed the issue by implementing improved validation checks in the specified macOS versions.

Potential Impact

The impact is limited to application availability, causing unexpected termination (denial of service) without compromising confidentiality or integrity. There are no known exploits in the wild.

Mitigation Recommendations

Apply the official fixes by updating macOS to Sequoia 15.7.5, Sonoma 14.8.5, or Tahoe 26.4 or later. These updates include improved checks that address the vulnerability.

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Technical Details

Data Version
5.2
Assigner Short Name
apple
Date Reserved
2025-11-11T14:43:07.872Z
State
PUBLISHED

Threat ID: 6a87a15cacd9273b496328d6

Added to database: 08/21/2026, 00:52:44 UTC

Last enriched: 09/11/2026, 03:33:11 UTC

Last updated: 10/05/2026, 06:48:15 UTC

Views: 63

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