CVE-2026-84576 in macOS
Summary
by MITRE • 09/15/2026
This issue was addressed with improved checks. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability described involves a failure in the operating system's security controls that allows an application to bypass intended restrictions and access sensitive user data. This type of flaw is typically categorized under CWE-200, which refers to Information Exposure, or more specifically CWE-798 if it involves unauthorized access to credentials or private keys, though in this context it most closely aligns with improper authorization checks that lead to the exposure of protected information. The core technical issue lies within the system's permission model where an application is granted privileges beyond its intended scope due to insufficient validation during runtime operations. This could manifest as a logic error in how the operating system evaluates access requests, allowing software to read files, retrieve keystrokes, or capture screen content that should remain isolated from third-party processes.
The operational impact of this vulnerability is significant for end-users whose privacy and data integrity are compromised. An attacker leveraging this flaw could extract personal information such as contact lists, messages, photos, or financial records stored on the device without explicit user consent. This undermines the fundamental trust model of macOS where applications operate within a sandboxed environment to limit their impact in case of compromise. The ability to access sensitive data can lead to identity theft, unauthorized surveillance, and further exploitation through social engineering attacks based on harvested personal details. In enterprise environments, this could result in the leakage of proprietary information or compliance violations under regulations such as GDPR or HIPAA if protected health information is involved.
Apple addressed this issue by implementing improved checks within the kernel and system frameworks to enforce stricter boundary conditions for application access requests. These enhancements likely involve more rigorous validation of process entitlements, tighter sandboxing rules, and better isolation mechanisms that prevent unauthorized data retrieval even when an app attempts to exploit legacy APIs or misconfigured permissions. The fix ensures that only explicitly authorized applications can interact with specific user data categories, reducing the attack surface for privilege escalation and information disclosure attacks.
To mitigate risks associated with this class of vulnerabilities before applying updates, users should ensure they are running the latest version of macOS, specifically macOS Golden Gate 27, macOS Sequoia 15.8, or macOS Tahoe 26.7 as indicated in the advisory. It is also advisable to review application permissions regularly through system settings and revoke access for apps that do not require it. Security professionals should monitor for indicators of compromise related to unauthorized data exfiltration and ensure endpoint detection systems are configured to flag unusual file read patterns by non-system processes. This incident highlights the importance of continuous patch management and adherence to least-privilege principles in maintaining a secure computing environment.