CVE-2026-64738 in macOS
Summary
by MITRE • 07/28/2026
A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A malicious app may be able to break out of its sandbox.
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Analysis
by VulDB Data Team • 07/28/2026
This vulnerability represents a critical sandbox escape flaw that undermines the fundamental security boundaries designed to isolate applications from system resources and user data. The issue stems from insufficient permission controls that allow malicious software to bypass the operating system's containment mechanisms. Such vulnerabilities are particularly dangerous because they directly compromise the core security architecture that protects users from potentially harmful applications. The fix addresses this by implementing additional restrictions that strengthen the sandboxing policies enforced by the operating system.
The technical nature of this flaw aligns with common sandbox escape patterns documented in cybersecurity literature, where insufficient access controls create pathways for privilege escalation. This type of vulnerability often relates to improper validation of application permissions or inadequate enforcement of security boundaries between different application contexts. The remediation approach involves tightening the permission model that governs how applications interact with system resources, particularly those that could be leveraged for unauthorized access or data exfiltration.
The operational impact of this vulnerability extends beyond simple sandbox bypass capabilities, as it enables malicious actors to potentially access sensitive user information, manipulate system resources, or escalate privileges within the affected operating system versions. Attackers could exploit this weakness to create persistent threats that operate outside normal security constraints, making detection and mitigation significantly more challenging. Organizations running affected macOS versions face increased risk of data breaches and system compromise through targeted attacks leveraging these sandbox escape capabilities.
Security professionals should prioritize deployment of the patched versions across all affected systems including macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, and macOS Tahoe 26.6 to ensure complete protection against this class of vulnerability. The remediation addresses fundamental access control issues that could be exploited by sophisticated threat actors employing advanced persistent threat techniques. This vulnerability demonstrates the critical importance of maintaining up-to-date security patches and highlights how seemingly minor permission controls can have significant implications for overall system security posture. Organizations should also implement additional monitoring measures to detect potential exploitation attempts targeting sandbox escape vulnerabilities, as these attacks often occur in the early stages of compromise before traditional security controls are fully engaged.
The vulnerability classification aligns with CWE-276 which addresses improper permissions and access control issues, while also mapping to ATT&CK techniques related to privilege escalation and persistence. This represents a classic example of how sandboxing mechanisms must be rigorously enforced to prevent unauthorized access to system resources and maintain the integrity of user data protection controls that are fundamental to modern operating system security models.