CVE-2026-28892 in macOS
Summary
by MITRE • 03/25/2026
A permissions issue was addressed by removing the vulnerable code. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to modify protected parts of the file system.
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Analysis
by VulDB Data Team • 03/29/2026
This vulnerability represents a critical permissions flaw that allowed unauthorized applications to modify protected filesystem components, potentially compromising system integrity and security controls. The issue stemmed from insufficient access controls that permitted malicious or compromised applications to bypass normal security boundaries and alter sensitive system files or directories. Such a vulnerability would enable attackers to undermine the fundamental security model of the operating system by gaining elevated privileges through legitimate application interfaces.
The technical root cause of this permissions issue involved improper validation of file system access requests within the kernel-level security subsystem. Applications could exploit this weakness to perform operations that should have been restricted to privileged processes or system components only. This flaw aligns with common software security vulnerabilities classified under CWE-284, which addresses improper access control mechanisms in software systems. The vulnerability essentially created a path for privilege escalation through filesystem manipulation, allowing non-privileged applications to perform administrative-level operations on protected system resources.
From an operational perspective, this vulnerability poses significant risks to system security and data integrity. Attackers could leverage this flaw to modify system binaries, configuration files, or security-related components, potentially enabling persistent backdoors or complete system compromise. The impact extends beyond immediate file system modifications to include potential data exfiltration, system instability, and complete loss of trust in the operating system's security model. This vulnerability would particularly affect enterprise environments where multiple applications run with varying permission levels, creating additional attack surfaces for malicious actors.
The remediation approach involved removing the vulnerable code paths that permitted unauthorized filesystem modifications while maintaining legitimate application functionality. Apple's patch addresses this issue through comprehensive code review and security hardening measures that restore proper access control enforcement. The fix applies to multiple macOS versions including Sequoia 15.7.5, Sonoma 14.8.5, and Tahoe 26.4, demonstrating the widespread impact of this vulnerability across the operating system ecosystem. Organizations should prioritize immediate deployment of these security updates to mitigate potential exploitation attempts and restore proper system security boundaries. The vulnerability's classification under ATT&CK framework would include techniques related to privilege escalation and persistence mechanisms, making it a critical concern for cybersecurity teams monitoring system integrity and access controls.