CVE-2026-43793 | An issue existed in the handling of environment variables. T… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-43793
State: PUBLISHED
Assigner: apple
Reserved: 2026-05-01 22:46 UTC
Published: 2026-07-27 20:13 UTC
Last updated: 2026-07-28 13:50 UTC
Primary CWE: CWE-20
CWE-20 Improper Input Validation
Vendor / Product: Apple / macOS
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
Apple	macOS	—	0 < 14.8.8, 0 < 15.7.8, 0 < 26.6

Weakness (CWE)

CWE	Source	Description
—	cna	An app may be able to cause unexpected system termination
CWE-20	adp	CWE-20 Improper Input Validation

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	adp	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (3)