A high-severity permissions flaw in Apple macOS enables unauthorized access to sensitive user data, necessitating an immediate update to the latest provided versions.

This vulnerability involves a sandbox breakout issue where a local, low-privileged application can bypass security restrictions to access sensitive user data. The issue is addressed through improved sandbox enforcement.

Successful exploitation of this vulnerability allows a malicious application to circumvent intended security boundaries, potentially resulting in the unauthorized disclosure of sensitive user information. With a CVSS score of 7.5, this flaw poses a significant risk to data confidentiality, particularly in environments where untrusted software may be executed by standard users.

Immediate Action: Update all affected macOS systems to macOS Sequoia 15.7.2 or macOS Tahoe 26.1 as specified in the official Apple security advisory.

Proactive Monitoring: Monitor system logs for unusual application behavior or unexpected file access patterns that may indicate an attempt to bypass sandbox restrictions.

Compensating Controls: Enforce strict application control policies to ensure only verified and trusted software is installed on endpoints, minimizing the risk of executing malicious local applications.

Public Exploit Available: Unknown.

The vulnerability represents a significant lapse in the sandbox security model of macOS. Organizations should prioritize updating all endpoints to the latest versions identified by Apple to ensure these sandbox restrictions are correctly applied. Failure to patch may expose sensitive user data to compromise by any malicious application running on the affected host.