CVE-2026-20680: Apple iPadOS Information Disclosure Issue

CVE-2026-20680 Overview

CVE-2026-20680 is a sandbox bypass vulnerability affecting Apple's macOS, iOS, and iPadOS operating systems. The flaw exists in how app states are observed and tracked, allowing a sandboxed application to access sensitive user data that should be protected by the sandbox boundary. Apple addressed this issue by implementing additional restrictions on the observability of app states.

Critical Impact

A sandboxed application can escape its security constraints to access sensitive user data, potentially compromising user privacy and data confidentiality across Apple devices.

Affected Products

• Apple macOS Tahoe (versions prior to 26.3)
• Apple macOS Sonoma (versions prior to 14.8.4)
• Apple macOS Sequoia (versions prior to 15.7.4)
• Apple iOS (versions prior to 18.7.5 and 26.3)
• Apple iPadOS (versions prior to 18.7.5 and 26.3)

Discovery Timeline

• 2026-02-11 - CVE-2026-20680 published to NVD
• 2026-02-12 - Last updated in NVD database

Technical Details for CVE-2026-20680

Vulnerability Analysis

This vulnerability represents a sandbox escape condition in Apple's operating systems. The sandbox mechanism is designed to restrict applications from accessing system resources and user data beyond their designated scope. However, a flaw in how app states are observed allowed malicious applications to circumvent these restrictions.

The vulnerability enables unauthorized access to sensitive user data from within a sandboxed environment. The attack requires local access and low privileges to execute, but critically, it can affect resources beyond the vulnerable component's security scope (changed scope). The primary impact is to data confidentiality, with no direct effect on integrity or availability.

Root Cause

The root cause of CVE-2026-20680 lies in insufficient restrictions on app state observability within Apple's sandboxing framework. The sandbox implementation did not adequately prevent applications from observing or inferring information about other applications' states, creating an information disclosure channel that could be exploited to access protected user data.

This represents a design-level issue in the isolation boundaries between sandboxed applications and the broader system environment. The observability of app states provided enough information leakage to allow an attacker to access data that should have been protected by the sandbox boundary.

Attack Vector

The attack vector for this vulnerability is local, requiring an attacker to have the ability to execute a malicious application on the target device. The exploitation scenario involves:

1. An attacker crafts a malicious application that appears legitimate
2. The victim installs and runs the application, which operates within the sandbox
3. The malicious application exploits the app state observability flaw to observe other applications' states
4. Through this observation channel, the attacker gains access to sensitive user data that should be protected by sandbox restrictions

The attack does not require user interaction once the malicious application is running, making it particularly dangerous for scenarios where users install applications from untrusted sources or where applications are compromised post-installation.

Detection Methods for CVE-2026-20680

Indicators of Compromise

• Unusual inter-process communication patterns from sandboxed applications
• Applications attempting to access data directories or resources outside their sandbox container
• Abnormal system call patterns related to process state queries or file access
• Log entries indicating sandbox violation attempts or unexpected permission requests

Detection Strategies

• Monitor for applications exhibiting unusual behavior patterns when querying system state information
• Implement endpoint detection rules to identify sandbox escape attempts or unusual cross-application data access
• Review application logs for attempts to access protected user data directories
• Deploy behavioral analysis to detect applications observing other app states inappropriately

Monitoring Recommendations

• Enable comprehensive system logging on Apple devices to capture sandbox-related events
• Implement Mobile Device Management (MDM) solutions to monitor application behavior across fleet devices
• Configure SentinelOne agents to detect and alert on sandbox bypass indicators on macOS endpoints
• Regularly audit installed applications and their permissions on managed devices

How to Mitigate CVE-2026-20680

Immediate Actions Required

• Update all affected Apple devices to the patched versions immediately
• Audit installed applications and remove any untrusted or unnecessary software
• Enable automatic updates on all managed Apple devices to receive future security patches
• Review security policies for application installation on corporate-managed devices

Patch Information

Apple has released security updates addressing CVE-2026-20680 in the following versions:

• macOS Tahoe 26.3 - Apple Security Advisory #126346
• macOS Sonoma 14.8.4 - Apple Security Advisory #126347
• macOS Sequoia 15.7.4 - Apple Security Advisory #126348
• iOS 18.7.5 and iPadOS 18.7.5 - Apple Security Advisory #126349
• iOS 26.3 and iPadOS 26.3 - Apple Security Advisory #126350

Organizations should prioritize updating devices handling sensitive data and ensure all endpoints are patched within their vulnerability management SLA.

Workarounds

• Restrict application installations to trusted sources only (App Store or enterprise-signed applications)
• Implement strict application whitelisting policies on managed devices
• Limit user privileges and enforce principle of least privilege for device users
• Consider network segmentation to limit data exposure from potentially compromised devices

# macOS: Check current system version
sw_vers

# macOS: Check for available updates
softwareupdate --list

# macOS: Install all available updates
softwareupdate --install --all

# iOS/iPadOS: Updates must be applied through Settings > General > Software Update