CVE-2026-86976 in iOS
Summary
by MITRE • 10/20/2026
An authorization issue was addressed with improved state management. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27. An app may be able to access sensitive user data.
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Analysis
by VulDB Data Team • 10/20/2026
The vulnerability described constitutes a critical flaw in the operating system's authorization framework, specifically rooted in inadequate state management mechanisms within the application execution environment on iOS, iPadOS, and macOS platforms. This issue allows an application that has been granted limited or specific permissions to bypass intended access controls and retrieve sensitive user data beyond its authorized scope. The root cause lies in how the system maintains session states and permission contexts during app interactions; when state management is flawed, the operating system may fail to properly invalidate previous authorization tokens or context switches, thereby permitting subsequent operations to inherit elevated privileges that were not explicitly granted for the current action. This type of flaw aligns with CWE-269, which classifies Improper Privilege Management, as it involves a failure by software to correctly enforce security policies regarding user roles and permissions.
From an operational perspective, this vulnerability poses significant risks to user privacy and data integrity. An attacker who can exploit this state management error could craft malicious applications or manipulate existing ones to access personal information such as contacts, photos, location history, or private documents without the user's knowledge or consent. The impact is particularly severe because it undermines the fundamental trust model of mobile operating systems, where sandboxing and permission boundaries are designed to isolate apps from each other and from core system resources. By bypassing these controls, an app can effectively operate with higher privileges than intended, leading to potential data exfiltration, identity theft, or further lateral movement within a device if the compromised account has access to synchronized cloud services.
This vulnerability is also relevant to MITRE ATT&CK techniques related to Privilege Escalation and Collection of Application Data. Specifically, it reflects behaviors associated with T1078 Valid Accounts when an attacker leverages legitimate but misconfigured app permissions, or T1530 Data from Local System if the accessed data includes locally stored sensitive files. The exploitation likely involves manipulating API calls to exploit race conditions or state persistence errors where the system fails to reset security contexts between different user actions or application transitions. For instance, an attacker might trigger a sequence of events that leaves the authorization token in a persistent high-privilege state, allowing subsequent requests to access restricted resources as if they were part of the original authorized session.
Mitigation for this vulnerability relies primarily on the deployment of the software updates provided by Apple in iOS 27, iPadOS 27, and macOS Golden Gate 27. These updates address the underlying code defects responsible for the improper state management, ensuring that authorization contexts are correctly isolated and invalidated after each operation or when switching between different security domains. Administrators and users should ensure their devices are updated to these versions immediately to close this attack vector. Additionally, developers of third-party applications must adhere strictly to least-privilege principles during development, requesting only the permissions necessary for specific functionalities and ensuring that any custom state management logic is rigorously tested against privilege escalation scenarios. Security monitoring tools can also be configured to detect anomalous patterns of data access that deviate from an application's typical behavior profile, providing a secondary layer of defense against exploitation attempts while patching strategies are implemented across enterprise environments.