What is CVE-2026-84553?

CVE-2026-84553 is a high-severity vulnerability in Apple macOS, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-14.

How severe is CVE-2026-84553?

High severity. CVSS v3 base score is 7.5 out of 10.

Resource exhaustion in Apple macOS

CVE-2026-84553

A resource exhaustion issue was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. A remote attacker may be able to cause a denial-of-service.

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apple Macos

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

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-2026-84553?: CVE-2026-84553 is a high-severity vulnerability in Apple macOS, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-09-14.
How severe is CVE-2026-84553?: High severity. CVSS v3 base score is 7.5 out of 10.