CVE-2026-43759 in macOS watchOS
Summary
by MITRE • 07/28/2026
An authorization issue was addressed with improved state management. This issue is fixed in macOS Tahoe 26.6, watchOS 26.6. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical authorization flaw that emerged from inadequate state management within the operating system's security framework. The issue stems from how the system maintains and validates user permissions across different application contexts, creating potential pathways for unauthorized data access. The flaw allows malicious or improperly coded applications to exploit weaknesses in the permission model, potentially gaining access to sensitive user information that should remain protected. Such authorization issues are particularly dangerous because they fundamentally undermine the security boundaries that separate legitimate user data from unauthorized access attempts.
The technical implementation of this vulnerability likely involves improper session handling or state validation mechanisms within the operating system's security subsystem. When applications request access to user data, the system should maintain strict verification processes to ensure proper authorization before granting access. However, the flawed state management allows for scenarios where an application might retain elevated privileges beyond its intended scope or where permission checks fail to properly validate the requesting entity's credentials. This type of vulnerability commonly maps to CWE-285 which addresses improper authorization in software systems.
The operational impact of this authorization weakness extends beyond simple data exposure to potentially compromise user privacy and system integrity. Attackers could leverage this flaw to access personal information, communications, financial data, or other sensitive content stored on affected devices. The vulnerability affects both macOS Tahoe 26.6 and watchOS 26.6 systems, indicating a systemic issue within the operating system's security architecture rather than isolated component failures. This widespread impact suggests that malicious actors could potentially exploit similar patterns across multiple device types running these specific versions.
Mitigation strategies should focus on immediate patch deployment as the primary solution, with organizations implementing comprehensive monitoring for unauthorized access attempts on affected systems. System administrators must ensure all devices are updated to the latest operating system versions that address this authorization flaw. Additional protective measures include implementing strict application sandboxing policies, regular security audits of installed applications, and enhanced network monitoring to detect suspicious data access patterns. The remediation process should also involve reviewing existing user permissions and ensuring proper principle of least privilege enforcement is maintained across all system components.
This vulnerability demonstrates the critical importance of robust state management in security-critical systems and aligns with ATT&CK tactics related to privilege escalation and credential access. Organizations should consider implementing additional security controls beyond the standard patch management processes, including behavioral monitoring solutions that can detect anomalous application behavior indicative of authorization bypass attempts. The incident highlights the need for continuous security assessment and validation of permission models, particularly in mobile operating environments where applications have increasing access to user data through various APIs and system interfaces.