CVE-2025-43371
📋 TL;DR
This vulnerability allows malicious macOS/iOS apps to escape their sandbox restrictions, potentially accessing system resources or other apps' data. It affects developers using Xcode to build apps and users running apps built with vulnerable Xcode versions. Apple has addressed this in Xcode 26.
💻 Affected Systems
- Xcode
📦 What is this software?
Xcode by Apple
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where a malicious app gains root privileges, accesses sensitive user data, modifies system files, or attacks other applications.
Likely Case
Malicious app accesses restricted files or system resources it shouldn't have permission to, potentially stealing data or performing unauthorized actions.
If Mitigated
App remains confined to its sandbox with minimal impact due to proper app review processes and user permission controls.
🎯 Exploit Status
Requires user to install and run a malicious app. Exploitation details not publicly disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Xcode 26
Vendor Advisory: https://support.apple.com/en-us/125117
Restart Required: No
Instructions:
1. Open App Store on macOS. 2. Search for Xcode. 3. Update to Xcode 26. 4. Rebuild and redistribute any apps built with older Xcode versions.
🔧 Temporary Workarounds
Restrict app installations
allOnly install apps from trusted sources like the App Store or verified developers.
🧯 If You Can't Patch
- Only run apps from trusted sources and verified developers
- Use macOS Gatekeeper settings to restrict app installations to App Store only
🔍 How to Verify
Check if Vulnerable:
Check Xcode version: Open Xcode → About Xcode. If version is below 26, you're vulnerable.Check Version:
xcodebuild -versionVerify Fix Applied:
Confirm Xcode version is 26 or higher in About Xcode dialog.📡 Detection & Monitoring
Log Indicators:
- Console logs showing sandbox violations or unexpected file access
- Security logs with sandbox escape attempts
Network Indicators:
- Unusual network activity from apps that shouldn't have network access
SIEM Query:
process_name:app AND event_type:sandbox_violation OR file_access:system_path