CVE-2026-43793

Analyzed Analyzed - Analysis Complete

Unexpected System Termination in macOS

Publication date: 2026-07-27

Last updated on: 2026-07-28

Assigner: Apple Inc.

Description

An issue existed in the handling of environment variables. This issue was addressed with improved validation. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-27

Last Modified

2026-07-28

Generated

2026-08-17

AI Q&A

2026-07-28

EPSS Evaluated

2026-08-15

NVD

CVE-2026-43793

EUVD

EUVD-2026-49557

Affected Vendors & Products

Vendor	Product	Version / Range
apple	macos	From 14.0 (inc) to 14.8.8 (exc)
apple	macos	From 15.0 (inc) to 15.7.8 (exc)
apple	macos	From 26.0 (inc) to 26.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-20	The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Attack-Flow Graph

Executive Summary

This vulnerability involves improper handling of environment variables, which could allow an app to cause unexpected system termination. It was addressed with improved validation in specific macOS versions.

Detection Guidance

This vulnerability is specific to macOS versions before Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6. Detection involves checking your macOS version against these patched versions. Use the command 'sw_vers' in Terminal to display your current macOS version.

Impact Analysis

An attacker could exploit this to crash your system unexpectedly by manipulating environment variables. This may lead to data loss or disruption of services if not patched.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves unexpected system termination due to environment variable handling, which may affect system availability but lacks details on data exposure or privacy implications.

Mitigation Strategies

Update to the latest patched versions of macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, or macOS Tahoe 26.6 to address the environment variable handling issue.

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