What is CVE-2026-43793?

CVE-2026-43793 is a critical-severity vulnerability in Apple Macos, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-07-27.

How severe is CVE-2026-43793?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Apple Macos

CVE-2026-43793

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…

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-43793?: CVE-2026-43793 is a critical-severity vulnerability in Apple Macos, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2026-07-27.
How severe is CVE-2026-43793?: Critical severity. CVSS v3 base score is 9.8 out of 10.