What is CVE-2026-84547?

CVE-2026-84547 is a low-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 3.5/10. Published 2026-10-20.

How severe is CVE-2026-84547?

Low severity. CVSS v3 base score is 3.5 out of 10.

Improper input validation in Apple macOS

CVE-2026-84547

A memory corruption issue was addressed with improved input validation. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An attacker in physical proximity may be able to corrupt process memory.

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

Published 2026-10-20 · last modified 2026-10-20.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Apple macOS

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

Frequently asked questions

What is CVE-2026-84547?: CVE-2026-84547 is a low-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 3.5/10. Published 2026-10-20.
How severe is CVE-2026-84547?: Low severity. CVSS v3 base score is 3.5 out of 10.