CVE-2026-84542: An access issue was addressed with improved access restrictions

Q: How do I fix CVE-2026-84542?

macos: upgrade to 15.8.2, 26.7.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-84542 being exploited?

CVE-2026-84542 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-84542 affect?

CVE-2026-84542 affects macos. Severity is medium (CVSS 5.5). An access issue was addressed with improved access restrictions. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app may be able to read files outside of its sandbox.

Q: How urgent is CVE-2026-84542?

Priority 23/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2026-84542 is a medium-severity flaw (CVSS 5.5) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An access issue was addressed with improved access restrictions. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app may be able to read files outside of its sandbox.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 86%)
CISA exploited list	No
Weakness	CWE-284
Published	2026-10-26
Last modified	2026-11-04

Publisher (CNA): Apple Inc. · Vendor: apple

Last updated 2026-11-04 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-26 21:20 UTCPublished CVE record published
2026-11-04 17:35 UTCUpdated Record last modified

apple macos UPGRADE

Affected: < 15.8.2 · >= 26.0 and < 26.7.2

Fixed in: 15.8.2, 26.7.2

Safe to downgrade to: a release before 26.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-84542?

macos: upgrade to 15.8.2, 26.7.2. Exact commands for each OS are on this page.

Is CVE-2026-84542 being exploited?

CVE-2026-84542 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-84542 affect?

CVE-2026-84542 affects macos. Severity is medium (CVSS 5.5). An access issue was addressed with improved access restrictions. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An app may be able to read files outside of its sandbox.

How urgent is CVE-2026-84542?

Priority 23/100. No elevated risk signals yet.

Software pages

macOS vulnerabilities

Related CVEs

CVE-2024-27834 MEDIUM 5.5 UPGRADE UPGRADE The issue was addressed with improved checks
CVE-2026-112569 HIGH 8.2 UPGRADE An access issue was addressed with additional sandbox restrictions
CVE-2026-112570 HIGH 8.2 UPGRADE An access issue was addressed with additional sandbox restrictions
CVE-2026-112571 MEDIUM 5.5 UPGRADE UPGRADE A memory initialization issue was addressed with improved memory handling
CVE-2026-112575 MEDIUM 6.2 UPGRADE The issue was addressed with improved handling of secure input state

References

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