CVE-2026-20649
📋 TL;DR
This CVE describes a logging vulnerability where sensitive user information was not properly redacted in system logs. Attackers with access to log files could potentially view private user data. The vulnerability affects Apple devices running watchOS, iOS, iPadOS, tvOS, and macOS before version 26.3.
💻 Affected Systems
- watchOS
- iOS
- iPadOS
- tvOS
- macOS
📦 What is this software?
Ipados by Apple
Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →Tvos by Apple
Watchos by Apple
⚠️ Risk & Real-World Impact
Worst Case
An attacker with access to system logs could extract sensitive user information including authentication credentials, personal data, or other private information stored in logs.
Likely Case
Local attackers or malicious applications could access improperly redacted logs containing user data, potentially leading to information disclosure.
If Mitigated
With proper access controls and log file permissions, only authorized administrators could access logs, limiting exposure.
🎯 Exploit Status
Exploitation requires access to system logs, which typically requires local access or compromised applications.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: watchOS 26.3, iOS 26.3, iPadOS 26.3, tvOS 26.3, macOS Tahoe 26.3
Vendor Advisory: https://support.apple.com/en-us/126346
Restart Required: No
Instructions:
1. Open Settings/System Preferences. 2. Navigate to Software Update. 3. Download and install the latest update (version 26.3 or later). 4. Verify installation is complete.
🔧 Temporary Workarounds
Restrict log file access
macOSImplement strict file permissions on system log directories to limit access to authorized administrators only.
chmod 640 /var/log/*
chown root:admin /var/log/*
🧯 If You Can't Patch
- Implement strict access controls on log directories and files
- Monitor log access attempts and implement alerting for unauthorized access
🔍 How to Verify
Check if Vulnerable:
Check current OS version in Settings > General > About (iOS/iPadOS) or About This Mac (macOS). If version is below 26.3, the system is vulnerable.Check Version:
sw_vers (macOS) or Settings > General > About > Version (iOS/iPadOS)Verify Fix Applied:
Confirm OS version is 26.3 or higher in system settings and verify no sensitive data appears in recent log entries.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to log files
- Log entries containing unredacted sensitive data patterns
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="*log*" AND (sensitive_data_patterns OR unauthorized_access_attempts)