CVE-2026-84573 in macOS
Summary
by MITRE • 09/15/2026
This issue was addressed with improved checks. 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 involves a failure in the operating system's enforcement of application sandboxing and privacy controls, specifically within Apple's macOS ecosystem. This flaw allows an unauthorized or maliciously crafted application to bypass standard permission checks and gain access to sensitive user data that should remain isolated from untrusted processes. The root cause lies in insufficient validation logic during the request for privileged resources, which constitutes a classic authorization failure where the system fails to properly verify whether the requesting entity has the requisite rights before granting access. This type of flaw is commonly categorized under CWE-269 Improper Privilege Management or CWE-755 Improper Handling of Exceptional Conditions if it stems from unhandled edge cases in permission verification routines.
From an operational perspective, this vulnerability poses a significant risk to user privacy and data integrity. An attacker who can exploit this flaw could potentially exfiltrate personal files, browser history, credentials stored in keychains, or other private information without triggering standard security alerts. This bypasses the principle of least privilege that macOS enforces through its sandboxing architecture, effectively allowing an application to operate with higher privileges than intended by the user or system configuration. Such access can lead to identity theft, financial loss, and compromise of broader network security if the accessed data includes authentication tokens or sensitive corporate documents.
The remediation for this issue was implemented in macOS Golden Gate 27, macOS Sequoia 15.8, and macOS Tahoe 26.7 through improved checks within the system's access control mechanisms. These updates likely involve stricter validation of entitlements, enhanced monitoring of cross-process data requests, or more robust enforcement of sandbox boundaries to ensure that applications cannot escalate their privileges or access restricted areas without explicit user consent and proper authorization. The fix addresses the underlying logic error that permitted the unauthorized data retrieval, thereby restoring the integrity of the system's security model.
To mitigate the risks associated with this vulnerability before applying updates, users should exercise caution when installing third-party software, ensuring it comes from trusted sources verified by Apple’s notarization process. Enabling Gatekeeper and keeping macOS fully updated are critical steps in maintaining a secure environment. Additionally, reviewing application permissions within System Settings can help identify any apps that have been granted excessive access to sensitive data categories such as full disk access or files and folders. Security professionals should monitor for indicators of compromise related to unauthorized file system reads or unusual process behavior that may indicate exploitation attempts targeting this specific flaw in older versions of the operating system.