CVE-2026-65356 in macOS
Summary
by MITRE • 10/20/2026
An access issue was addressed with improved access controls. 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.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/20/2026
The vulnerability described involves a flaw in the operating system's permission management architecture, specifically within the components governing application sandboxing and entitlements on Apple platforms including macOS Sequoia, Tahoe, and Golden Gate. This issue stems from an improper implementation of access controls that are designed to restrict applications from accessing sensitive user data such as contacts, photos, location history, or personal documents without explicit user consent. In a properly secured environment, the operating system enforces strict boundaries between application processes and protected resource directories, requiring each app to request specific permissions which are then validated against the device's privacy settings before granting access. The flaw in this case allows an application to bypass these checks or exploit a logic error that permits unauthorized retrieval of private information, effectively breaking the isolation model intended to protect user privacy.
From a technical perspective, this type of vulnerability is classified under CWE-269 Improper Privilege Management and often relates to CWE-732 Incorrect Permission Assignment for Critical Resource when considering the file system aspects, or CWE-200 Exposure of Sensitive Information to an Unauthorized Actor regarding the data leakage. The root cause typically involves a failure in the validation logic within the security daemon that mediates access requests between applications and protected services like ContactsKit or Photos framework. An attacker could craft a malicious application that leverages this misconfiguration to query these APIs without triggering the standard permission prompts, thereby silently harvesting sensitive user data in the background. This bypasses the transparency mechanisms users rely on to understand what their software is accessing, leading to potential privacy violations and unauthorized surveillance capabilities for threat actors who distribute such applications through official or third-party channels.
The operational impact of this vulnerability is significant as it undermines the fundamental trust model of the operating system regarding user data protection. If exploited, an application could exfiltrate personally identifiable information including email addresses, phone numbers, calendar events, and geolocation data to remote servers controlled by malicious actors. This can lead to identity theft, targeted phishing campaigns using harvested personal details, or corporate espionage if used on devices handling sensitive business communications. The severity is heightened because the flaw exists at the OS level rather than within a single application codebase, meaning it affects all apps that attempt to access these protected resources unless they are specifically patched or restricted by subsequent policy updates. Users may remain unaware of the data theft as the malicious app operates without generating standard system alerts for permission denials or requests.
Mitigation strategies primarily involve applying the provided software update which corrects the underlying logic errors in the access control subsystem. Administrators and users should ensure that macOS Sequoia 15.8, Tahoe 26.7, and Golden Gate 27 are installed immediately to patch this specific flaw. Beyond updating the OS, it is advisable for organizations to enforce strict application whitelisting policies using tools like Apple's Device Management protocols or third-party endpoint detection solutions that monitor API calls related to sensitive data access. Users should also regularly review app permissions in system settings and revoke access for applications that do not require such privileges. Additionally, enabling features like App Privacy Reports can help detect anomalous behavior where apps attempt to access resources they have not been granted permission to use, providing an additional layer of visibility into potential exploitation attempts before significant data loss occurs.