CVE-2026-112556: A race condition was addressed with additional validation

Q: How do I fix CVE-2026-112556?

macos: upgrade to 15.8.2, 26.7.2, 27.2. Exact commands for each OS are on this page.

Q: Is CVE-2026-112556 being exploited?

CVE-2026-112556 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-2026-112556 affect?

CVE-2026-112556 affects macos. Severity is medium (CVSS 4.8). A race condition was addressed with additional validation. This issue is fixed in macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An attacker may tamper with code-signed applications to execute arbitrary code in the applic

Q: How urgent is CVE-2026-112556?

Priority 30/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 4.8REMOTEUPGRADE

CVE-2026-112556 is a medium-severity flaw (CVSS 4.8) affecting macos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A race condition was addressed with additional validation. This issue is fixed in macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An attacker may tamper with code-signed applications to execute arbitrary code in the application's context.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	4.8 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 69%)
CISA exploited list	No
Weakness	CWE-362
Published	2026-10-26
Last modified	2026-10-30

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

Last updated 2026-10-30 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-10-26 21:17 UTCPublished CVE record published
2026-10-30 13:42 UTCUpdated Record last modified

apple macos UPGRADE

Affected: >= 15.0 and < 15.8.2 · >= 26.0 and < 26.7.2 · >= 27.0 and < 27.2

Fixed in: 15.8.2, 26.7.2, 27.2

Safe to downgrade to: a release before 15.0

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-2026-112556?

macos: upgrade to 15.8.2, 26.7.2, 27.2. Exact commands for each OS are on this page.

Is CVE-2026-112556 being exploited?

CVE-2026-112556 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-2026-112556 affect?

CVE-2026-112556 affects macos. Severity is medium (CVSS 4.8). A race condition was addressed with additional validation. This issue is fixed in macOS Golden Gate 27.2, macOS Sequoia 15.8.2, macOS Tahoe 26.7.2. An attacker may tamper with code-signed applications to execute arbitrary code in the applic

How urgent is CVE-2026-112556?

Priority 30/100. Remotely exploitable, no login, no user action

Software pages

macOS vulnerabilities

Related CVEs

CVE-2026-113947 HIGH 8.8 UPGRADE This issue was addressed with improved access restrictions
CVE-2026-28854 HIGH 7.5 UPGRADE The issue was addressed with additional app bundle integrity checks
CVE-2026-86915 MEDIUM 4.7 UPGRADE A race condition was addressed with improved locking
CVE-2026-86928 MEDIUM 5.5 UPGRADE A path handling issue was addressed with improved validation
CVE-2026-86932 MEDIUM 5.5 UPGRADE An authorization issue was addressed with improved state management

References

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