CVE-2026-28833: Apple iPadOS Information Disclosure Flaw

CVE-2026-28833 Overview

A permissions issue in Apple operating systems allows applications to enumerate a user's installed apps without proper authorization. This vulnerability affects iOS, iPadOS, macOS Tahoe, and visionOS, exposing sensitive information about user behavior and installed software to potentially malicious applications.

Critical Impact

Malicious applications can enumerate installed apps on affected devices, potentially enabling targeted attacks, profiling user behavior, or identifying vulnerable software for further exploitation.

Affected Products

• Apple iOS (versions prior to 26.4)
• Apple iPadOS (versions prior to 26.4)
• Apple macOS Tahoe (versions prior to 26.4)
• Apple visionOS (versions prior to 26.4)

Discovery Timeline

• 2026-03-25 - CVE-2026-28833 published to NVD
• 2026-03-25 - Last updated in NVD database

Technical Details for CVE-2026-28833

Vulnerability Analysis

This vulnerability stems from insufficient permission restrictions in Apple's operating system sandbox implementation. The flaw allows applications to bypass intended isolation boundaries and access information about other installed applications on the device. While the attack requires local access (a malicious app must already be installed on the device), no user interaction is needed for exploitation. The vulnerability results in high confidentiality impact as it enables unauthorized access to sensitive user information about installed applications.

Root Cause

The root cause is an improper permissions configuration within Apple's app sandboxing mechanism. The operating system failed to adequately restrict inter-application visibility, allowing apps to query system APIs or access file system locations that reveal information about other installed applications. Apple addressed this by implementing additional restrictions on these permission checks.

Attack Vector

This is a local attack vector requiring a malicious application to be installed on the target device. Once installed, the malicious app can exploit the permissions flaw to enumerate all applications installed on the device without requiring any special privileges or user interaction. This information can be used for:

• Fingerprinting devices for targeted attacks
• Identifying vulnerable applications for chained exploits
• Profiling user behavior and interests
• Bypassing security controls that rely on app isolation

The vulnerability does not provide a direct path to code execution or system compromise, but the information gathered can enable more sophisticated follow-up attacks.

Detection Methods for CVE-2026-28833

Indicators of Compromise

• Unusual application queries to system APIs related to application listing
• Applications accessing restricted file system paths containing app metadata
• Unexpected inter-process communication attempts between sandboxed apps
• Log entries showing permission boundary violations

Detection Strategies

• Monitor for applications making excessive calls to app enumeration APIs
• Implement endpoint detection rules for sandbox escape attempts
• Review application permissions and entitlements for suspicious configurations
• Deploy SentinelOne Singularity to detect anomalous application behavior patterns

Monitoring Recommendations

• Enable verbose logging on Apple devices for security audit purposes
• Implement Mobile Device Management (MDM) solutions to monitor app installations
• Use SentinelOne's mobile threat defense capabilities to identify potentially malicious applications
• Regularly audit installed applications against approved software lists

How to Mitigate CVE-2026-28833

Immediate Actions Required

• Update all affected Apple devices to the latest patched versions immediately
• Review installed applications and remove any untrusted or suspicious apps
• Enable automatic updates on all Apple devices to receive future security patches
• Implement application whitelisting policies through MDM solutions

Patch Information

Apple has released security updates addressing this vulnerability in the following versions:

• iOS 26.4 and iPadOS 26.4 - Apple Support Advisory #126792
• macOS Tahoe 26.4 - Apple Support Advisory #126794
• visionOS 26.4 - Apple Support Advisory #126799

Organizations should prioritize patching based on device criticality and user exposure levels.

Workarounds

• Only install applications from the official Apple App Store
• Restrict app installation privileges using MDM policies until patches are applied
• Review and revoke unnecessary application permissions on affected devices
• Implement network segmentation to limit potential data exfiltration from compromised devices

# Verify iOS/iPadOS version via command line (for supervised devices)
# Check current OS version through MDM console or:
# Settings > General > About > Software Version
# Ensure version is 26.4 or later