CVE-2026-65378 in macOS
Summary
by MITRE • 09/15/2026
An authorization issue was addressed with improved state management. 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 constitutes a critical authorization flaw rooted in inadequate state management within the operating system's security framework. In complex software architectures, particularly those involving sandboxed applications and privileged system services, maintaining accurate session states is paramount for enforcing access control policies. When an application transitions between different operational contexts or when multiple processes interact with shared resources, the integrity of these state variables determines whether subsequent actions are permitted or denied. The specific issue addressed in this update indicates that the previous implementation failed to properly validate or reset authorization tokens and context flags during certain lifecycle events. This lapse allows a maliciously crafted application to exploit inconsistencies in how permissions are tracked across different stages of execution, effectively bypassing intended restrictions designed to isolate user data from unauthorized access.
From a technical perspective, this flaw aligns with CWE-284 Improper Access Control, specifically where the system fails to enforce proper authorization checks due to flawed state management logic. The vulnerability likely manifests when an application leverages APIs or internal mechanisms that rely on transient states which are not sufficiently hardened against race conditions or manipulation. By manipulating these states, a compromised app can trick the operating system into believing it retains elevated privileges or valid access rights even after those permissions should have been revoked or restricted. This is particularly dangerous in environments where apps operate under strict sandboxing rules, as it undermines the fundamental isolation principles that protect user privacy and data integrity on macOS platforms.
The operational impact of this vulnerability is severe for end-users whose sensitive personal information resides within application containers protected by these authorization mechanisms. An attacker who successfully exploits this flaw could gain unauthorized access to files, preferences, keychain items, or other private data stored locally on the device. This exposure does not necessarily require a full system compromise but rather relies on social engineering or supply chain attacks to get an app installed and executed with minimal user interaction. Once inside, the ability to read sensitive user data can lead to identity theft, financial fraud, or further lateral movement within connected networks if such data includes credentials or authentication tokens. The risk is amplified by the widespread adoption of macOS in enterprise environments where device management policies rely on these security boundaries remaining intact.
Mitigation strategies primarily involve applying the provided software updates immediately across all affected systems. Apple has addressed this issue in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7 by refining the internal state management logic to ensure that authorization checks are consistently enforced regardless of application context switches or background processes. Administrators should verify patch compliance through centralized deployment tools to prevent exploitation across fleets of devices. Additionally, organizations should enforce strict app distribution policies using code signing requirements and runtime protection mechanisms like Gatekeeper to limit which applications can execute with elevated privileges. Regular security audits focusing on privilege escalation paths and state transition logic in custom or third-party software will further reduce the attack surface associated with such authorization flaws.
This incident highlights the importance of rigorous testing for race conditions and state inconsistencies during application development and system updates. Security researchers and developers should prioritize defensive programming techniques that assume any external input or internal state change could be maliciously manipulated. Implementing principle of least privilege at every layer ensures that even if a vulnerability like this is exploited, the potential damage remains contained within minimal scopes. Continuous monitoring for anomalous access patterns to sensitive directories can also serve as an early warning system for attempts to leverage such authorization bypasses in real-time environments.