What is CVE-2026-43719?

CVE-2026-43719 is a medium-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 6.5/10. Published 2026-09-14.

How severe is CVE-2026-43719?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Use After Free in Apple macOS

CVE-2026-43719

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. Mounting a maliciously crafted SMB network share may lead to system termination.

Vulnerability class: Use-After-Free

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Apple Macos

Weakness classification (CWE)

CWE-416 — Use After Free

References

product-security@apple.com
product-security@apple.com
product-security@apple.com

Frequently asked questions

What is CVE-2026-43719?: CVE-2026-43719 is a medium-severity vulnerability in Apple macOS, classified under Use After Free. CVSS score: 6.5/10. Published 2026-09-14.
How severe is CVE-2026-43719?: Medium severity. CVSS v3 base score is 6.5 out of 10.