macOS Sequoia 15.7.8 ENV Variable Validation Failure Leads to System Termination
CVE-2026-43793 Published on July 27, 2026
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.
Vulnerability Analysis
CVE-2026-43793 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Improper Input Validation
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.
Products Associated with CVE-2026-43793
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Affected Versions
Apple macOS:- Before 14.8.8 is affected.
- Before 15.7.8 is affected.
- Before 26.6 is affected.