CVE-2026-84514

macOS File System Modification Vulnerability from Missing Entitlement Checks

Published Sep 14, 2026 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed

Description

This issue was addressed with additional entitlement checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to modify protected parts of the file system.

Analysis

Technical impact

The vulnerability originates from missing entitlement checks and missing authorization in macOS, allowing a non‑privileged application to modify protected parts of the file system. This represents a weakness identified as CWE‑862. The ability to alter system files compromises integrity and may enable further malicious actions.

Affected Systems

Apple macOS is affected in all releases prior to macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7, which contain the fix for this issue. Therefore any older macOS version before those releases remains vulnerable.

Risk and Exploitability

The EPSS score is less than 1 % and the vulnerability is not listed in the CISA KEV catalog. The CVSS score of 5.5 indicates a moderate impact. The likely attack vector is inferred to be user‑initiated execution of a malicious or compromised application that exploits the missing entitlement checks to gain write access to protected file system locations.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Apple

macOS

affected

Version	Status	Constraints
`0`	affected	< 15.8
`0`	affected	< 26.7
`0`	affected	< 27

Configuration 1 [-]

OR	cpe:2.3:o:apple:macos::::::::
	cpe:2.3:o:apple:macos::::::::

No data.

Vendor Product Versions

Apple

Macos

Version	Status	Scheme	Platform
`[0,15.8)`	affected	generic	—
`[0,26.7)`	affected	generic	—
`[0,27)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade macOS to a version that includes the fix, such as macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7, or any newer release.
Configure macOS Gatekeeper to allow only apps from the App Store or identified developers, thereby reducing the likelihood that a malicious application can be installed or run.
Perform a filesystem integrity check to detect any unauthorized modifications that might have occurred.

Generated by OpenCVE AI on September 20, 2026 at 18:15 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.138% probability within 30 days)

Exploitation none

Automatable no

Technical Impact partial

References

Link	Providers
https://support.apple.com/en-us/149035
https://support.apple.com/en-us/149042
https://support.apple.com/en-us/149043

History

Sep 20, 2026 6:45 PM Title updated View changes

Type	Values Removed	Values Added
Title		macOS File System Modification Vulnerability from Missing Entitlement Checks

Sep 18, 2026 4:45 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:o:apple:macos::::::::

Sep 17, 2026 3:30 PM Weaknesses updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
Weaknesses		CWE-862
Metrics		cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N'}` ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 16, 2026 12:30 PM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title	macOS Vulnerability Allows Unprivileged App to Modify Protected File System
Weaknesses	CWE-284 CWE-732

Sep 15, 2026 8:45 AM Title updated. Weaknesses updated View changes

Type	Values Removed	Values Added
Title		macOS Vulnerability Allows Unprivileged App to Modify Protected File System
Weaknesses		CWE-284 CWE-732

Sep 15, 2026 2:45 AM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Apple Apple macos
Vendors & Products		Apple Apple macos

Sep 14, 2026 9:00 PM Description updated. Added references View changes

Type	Values Removed	Values Added
Description		This issue was addressed with additional entitlement checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to modify protected parts of the file system.
References		https://support.apple.com/en-us/149035 https://support.apple.com/en-us/149042 https://support.apple.com/en-us/149043