CVE-2026-65342 in macOS
Summary
by MITRE • 09/15/2026
A permissions issue was addressed with improved validation. 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 • 09/19/2026
The vulnerability described involves a critical failure in the operating system's permission validation mechanisms within Apple's macOS ecosystem, specifically affecting versions prior to macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. This flaw represents a significant breakdown in access control policies that are designed to isolate applications from sensitive user data such as contacts, photos, location history, or personal documents. In modern operating systems like macOS, the principle of least privilege is enforced through strict sandboxing and permission prompts, ensuring that an application can only interact with resources explicitly granted by the user. The identified issue indicates that this validation logic was insufficient, allowing certain applications to bypass these safeguards without proper authorization. This type of flaw typically stems from improper checks during runtime or a failure in the system's integrity verification processes when handling file system requests or API calls related to protected data stores.
From a technical perspective, this vulnerability aligns with CWE-269, which classifies Improper Privilege Management, and more specifically CWE-732, which refers to Incorrect Permission Assignment for Critical Resource. The core of the problem lies in the application's ability to access sensitive user data without meeting the necessary security criteria defined by the operating system. When an app requests access to protected resources, the OS is supposed to validate whether the requesting process has been explicitly granted that permission through a signed entitlement or a successful user consent dialog. In this case, the validation logic failed to reject unauthorized requests, effectively creating a path for privilege escalation at the application level. This allows malicious actors who can trick users into installing compromised software to extract private information directly from the file system or protected containers without triggering standard security alerts.
The operational impact of this vulnerability is severe, as it compromises user privacy and data integrity on affected systems. An attacker leveraging this flaw could develop a seemingly benign application that silently exfiltrates sensitive personal information in the background. This includes potentially highly confidential data such as financial records, health information, private communications, or intellectual property stored locally by the user. Because the access occurs without explicit user knowledge or consent, it undermines trust in the platform's security model and could lead to identity theft, blackmail, or corporate espionage if used against enterprise users. The ability of an app to bypass permission checks means that traditional defense-in-depth strategies relying on user awareness are rendered ineffective, as the system itself fails to enforce its own rules.
To mitigate this risk, it is imperative for all affected systems to be updated immediately to the latest patched versions mentioned in the advisory, including macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7. These updates contain the necessary code changes to strengthen validation routines and ensure that permission checks are robust against bypass attempts. Users should also adopt a cautious approach when installing third-party applications, verifying their source and reviewing requested permissions carefully before granting access. Additionally, organizations relying on these operating systems for sensitive operations should implement strict application whitelisting policies using tools like Apple's Gatekeeper or endpoint detection and response solutions to prevent unauthorized binaries from executing. Regular security audits of installed software can further reduce the attack surface by identifying any applications that may have exploited this vulnerability before patches were applied.