CVE-2026-86939: A permissions issue was addressed with additional restrictions

Q: How do I fix CVE-2026-86939?

macos: upgrade to 26.7.2, 27.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-86939 being exploited?

CVE-2026-86939 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-2026-86939 affect?

CVE-2026-86939 affects macos. Severity is medium (CVSS 4.9). A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Golden Gate 27.2, macOS Tahoe 26.7.2. An attacker with root privileges may be able to access protected user data.

Q: How urgent is CVE-2026-86939?

Priority 20/100. No elevated risk signals yet.

Routine

MEDIUM 4.9UPGRADE

CVE-2026-86939 is a medium-severity flaw (CVSS 4.9) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Golden Gate 27.2, macOS Tahoe 26.7.2. An attacker with root privileges may be able to access protected user data.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	4.9 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	High
User interaction	None
EPSS exploit chance	0.2% (top 88%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-10-26
Last modified	2026-11-03

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

Last updated 2026-11-03 · 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
2026-11-03 16:29 UTCUpdated Record last modified

apple macos UPGRADE

Affected: < 26.7.2 · >= 27.0 and < 27.2

Fixed in: 26.7.2, 27.2

Safe to downgrade to: a release before 27.0

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.

Advisories and coverage

Research and news

Vulners Bulletins: CVE-2026-86939 2026-10-26

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-2026-86939?

macos: upgrade to 26.7.2, 27.2. Exact commands for each OS are on this page.

Is CVE-2026-86939 being exploited?

CVE-2026-86939 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-2026-86939 affect?

CVE-2026-86939 affects macos. Severity is medium (CVSS 4.9). A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Golden Gate 27.2, macOS Tahoe 26.7.2. An attacker with root privileges may be able to access protected user data.

How urgent is CVE-2026-86939?

Priority 20/100. No elevated risk signals yet.

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-112699 MEDIUM 6.5 UPGRADE UPGRADE An out-of-bounds read was addressed with improved bounds checking
CVE-2026-112704 MEDIUM 6.5 UPGRADE An information leakage was addressed with additional validation
CVE-2026-112705 MEDIUM 5.5 UPGRADE UPGRADE An out-of-bounds write issue was addressed with improved bounds checking
CVE-2026-113897 CRITICAL 10.0 UPGRADE UPGRADE This issue was addressed by removing the vulnerable code
CVE-2026-113898 LOW 3.3 UPGRADE UPGRADE A logging issue was addressed with improved data redaction

References

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