What is CVE-2026-43747?

CVE-2026-43747 is a high-severity vulnerability in Apple Macos, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-07-27.

How severe is CVE-2026-43747?

High severity. CVSS v3 base score is 7.1 out of 10.

Out-of-bounds Read in Apple Macos

CVE-2026-43747

An out-of-bounds read was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. Parsing a maliciously crafted file may lead to an unexpected app termination.

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

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-2026-43747?: CVE-2026-43747 is a high-severity vulnerability in Apple Macos, classified under Out-of-bounds Read. CVSS score: 7.1/10. Published 2026-07-27.
How severe is CVE-2026-43747?: High severity. CVSS v3 base score is 7.1 out of 10.