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A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Tahoe 26. An app may be able to break out of its sandbox.

CVE-2025-43340 is a vulnerability in Apple macOS related to improper access control (CWE-284) that allows an application to escape its sandbox environment. Sandboxing is a critical security mechanism in macOS designed to isolate applications and limit their access to system resources and user data. This vulnerability arises from a permissions issue that was insufficiently restrictive, enabling an app to break out of its sandbox constraints. The flaw could be exploited by a local attacker or malicious app with limited privileges to escalate access rights, potentially gaining high-level control over the system. The vulnerability requires user interaction but no prior authentication, making it easier to exploit in scenarios where a user runs a malicious or compromised app. The issue was addressed in macOS Tahoe 26 by implementing additional restrictions to the sandboxing mechanism, thereby preventing apps from escaping their confined environment. The CVSS v3.1 base score of 7.8 reflects the high impact on confidentiality, integrity, and availability, combined with relatively low attack complexity and no need for privileges or authentication. Although no known exploits have been reported in the wild, the vulnerability poses a significant risk due to the widespread use of macOS in enterprise and consumer environments. Organizations relying on macOS should apply the patch promptly to prevent potential exploitation.

Detailed information about CVE-2025-43340: An app may be able to break out of its sandbox in Apple macOS affecting Apple macOS. Get real-time updates, technical

CVE-2025-43340: An app may be able to break out of its sandbox in Apple macOS - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-43340: An app may be able to break out of its sandbox in Apple macOS

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