CVE-2026-20606: Apple macOS/iOS Auth Bypass Vulnerability

CVE-2026-20606 Overview

CVE-2026-20606 is an Authorization Bypass vulnerability affecting multiple Apple operating systems including macOS Tahoe, macOS Sonoma, macOS Sequoia, iOS, and iPadOS. This vulnerability allows a malicious application to bypass certain Privacy preferences, potentially exposing sensitive user data without proper authorization. Apple addressed this issue by removing the vulnerable code from affected systems.

Critical Impact

A malicious application could circumvent built-in privacy controls, gaining unauthorized access to protected user data and sensitive system resources without user consent.

Affected Products

• macOS Tahoe (versions prior to 26.3)
• macOS Sonoma (versions prior to 14.8.4)
• macOS Sequoia (versions prior to 15.7.4)
• iOS 18.x (versions prior to 18.7.5)
• iPadOS 18.x (versions prior to 18.7.5)
• iOS 26.x (versions prior to 26.3)
• iPadOS 26.x (versions prior to 26.3)

Discovery Timeline

• 2026-02-11 - CVE-2026-20606 published to NVD
• 2026-02-12 - Last updated in NVD database

Technical Details for CVE-2026-20606

Vulnerability Analysis

This vulnerability stems from a flaw in how Apple's operating systems enforce Privacy preferences for applications. The vulnerable code path allowed applications to access protected resources without triggering the appropriate permission prompts or authorization checks. This represents a classic Information Exposure weakness (CWE-200), where sensitive data could be accessed by unauthorized processes.

The attack requires local access and user interaction, meaning an attacker would need to convince a user to install and run a malicious application. Once executed, the application could bypass privacy controls that normally protect access to sensitive data such as contacts, photos, location data, camera, microphone, and other protected resources.

Root Cause

The root cause of this vulnerability lies in vulnerable code that failed to properly enforce Privacy preference checks within the affected Apple operating systems. Rather than patching the flawed logic, Apple determined that removing the vulnerable code entirely was the appropriate remediation strategy, suggesting the code path was either redundant or could be safely eliminated without affecting legitimate functionality.

Attack Vector

This vulnerability requires local access to the target device. An attacker must craft a malicious application that exploits the privacy bypass flaw. The attack scenario typically involves:

1. An attacker creates a seemingly legitimate application that contains malicious code targeting this vulnerability
2. The user downloads and installs the application, either from third-party sources or potentially through social engineering
3. When the application runs, it bypasses privacy preference checks to access protected user data
4. The malicious application exfiltrates or misuses the sensitive information obtained

The vulnerability cannot be exploited remotely without first establishing local code execution on the target device.

Detection Methods for CVE-2026-20606

Indicators of Compromise

• Unexpected applications accessing protected resources (contacts, photos, location) without displaying permission prompts
• Applications with unusual entitlements or excessive privacy-related permissions in system logs
• System log entries showing privacy framework bypasses or authorization failures
• Unusual data access patterns from recently installed applications

Detection Strategies

• Monitor system logs for privacy framework anomalies and unauthorized resource access attempts
• Implement endpoint detection rules that flag applications accessing protected resources without corresponding TCC (Transparency, Consent, and Control) database entries
• Deploy behavioral analysis to identify applications exhibiting suspicious data access patterns
• Review installed applications for unsigned or untrusted code signatures

Monitoring Recommendations

• Enable enhanced logging for privacy-related system events on macOS, iOS, and iPadOS devices
• Implement Mobile Device Management (MDM) policies to monitor application installations and behavior
• Configure SentinelOne agents to detect privacy bypass attempts and alert on suspicious application behavior
• Regularly audit TCC database entries against expected application permissions

How to Mitigate CVE-2026-20606

Immediate Actions Required

• Update all affected Apple devices to the patched versions immediately (macOS Tahoe 26.3, macOS Sonoma 14.8.4, macOS Sequoia 15.7.4, iOS 18.7.5/26.3, iPadOS 18.7.5/26.3)
• Review recently installed applications and remove any untrusted or suspicious software
• Enable automatic software updates on all Apple devices to receive future security patches promptly
• Restrict application installations to trusted sources (App Store) where possible

Patch Information

Apple has released security updates that address this vulnerability by removing the vulnerable code. Detailed patch information is available in Apple's security advisories:

• Apple Security Advisory #126346
• Apple Security Advisory #126347
• Apple Security Advisory #126348
• Apple Security Advisory #126349
• Apple Security Advisory #126350

Organizations should prioritize deploying these patches across their Apple device fleet as part of their standard vulnerability management process.

Workarounds

• Restrict application installations to only App Store applications using MDM profiles or Parental Controls
• Enable Lockdown Mode on iOS devices for users in high-risk environments (note: this may limit some functionality)
• Implement application allowlisting policies to prevent unauthorized software execution
• Review and revoke unnecessary privacy permissions from existing applications in System Settings

# Check macOS version to verify patch status
sw_vers

# List applications with privacy permissions (macOS)
tccutil reset All

# Review TCC database entries (requires appropriate permissions)
sqlite3 ~/Library/Application\ Support/com.apple.TCC/TCC.db "SELECT * FROM access;"