CVE-2026-43796 Overview
CVE-2026-43796 is an information disclosure vulnerability affecting multiple Apple operating systems. The flaw allows a local application to access sensitive user data due to insufficient data protection controls. Apple addressed the issue through improved data protection mechanisms across its platform lineup.
The vulnerability requires local access and user interaction, limiting remote exploitation scenarios. However, malicious applications installed on affected devices can leverage the weakness to read data that should remain isolated. The issue is categorized under [CWE-200] Information Exposure.
Critical Impact
A malicious app with local execution on an unpatched Apple device can access sensitive user data, undermining application sandbox boundaries and user privacy expectations.
Affected Products
- Apple iOS and iPadOS prior to 26.6
- Apple macOS Sequoia prior to 15.7.8, macOS Sonoma prior to 14.8.8, and macOS Tahoe prior to 26.6
- Apple tvOS, visionOS, and watchOS prior to 26.6
Discovery Timeline
- 2026-07-27 - CVE-2026-43796 published to the National Vulnerability Database
- 2026-07-28 - Last updated in NVD database
Technical Details for CVE-2026-43796
Vulnerability Analysis
CVE-2026-43796 is an information disclosure flaw stemming from inadequate data protection across Apple's operating system family. Apple's advisory states the issue was resolved with improved data protection, indicating the original implementation failed to restrict access to protected user data. The weakness maps to [CWE-200], covering exposure of sensitive information to unauthorized actors.
The attack requires local access to the device and user interaction, meaning an attacker must first deliver and run an app on the target system. Once executing, the application can reach data that should be isolated by Apple's sandbox and entitlement model. The vulnerability affects confidentiality only; integrity and availability remain unaffected.
Root Cause
Apple has not disclosed the specific component or API responsible. The vendor description attributes the fix to "improved data protection," suggesting insufficient access controls or missing encryption on a data store, cache, or interprocess boundary. The cross-platform scope indicates a shared framework or system service common to iOS, macOS, tvOS, visionOS, and watchOS.
Attack Vector
An attacker distributes a crafted application through sideloading, enterprise provisioning, or the App Store. When a user launches the app, it queries the affected system interface and retrieves sensitive user data outside its granted entitlements. No network access, elevated privileges, or authentication bypass is required beyond running the app in the normal user context.
See the Apple Security Advisory #128066 and related bulletins for platform-specific technical details.
Detection Methods for CVE-2026-43796
Indicators of Compromise
- Applications making unexpected requests to system frameworks or private APIs handling user data
- Anomalous file access patterns from third-party apps targeting protected containers or shared directories
- Devices running iOS, iPadOS, tvOS, visionOS, or watchOS versions below 26.6, or macOS builds below 15.7.8, 14.8.8, or 26.6
Detection Strategies
- Inventory managed Apple endpoints and flag versions below the patched builds using MDM compliance reporting
- Review App Store, TestFlight, and enterprise-signed application installations for unvetted publishers
- Correlate application telemetry with data access events to identify apps reading data outside declared entitlements
Monitoring Recommendations
- Enable MDM-based OS version compliance policies and alert on non-compliant devices
- Monitor Unified Log entries on macOS for sandbox violations and TCC (Transparency, Consent, and Control) prompts triggered by unfamiliar processes
- Track newly installed applications across the fleet and validate them against approved software lists
How to Mitigate CVE-2026-43796
Immediate Actions Required
- Update all Apple devices to iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, visionOS 26.6, and watchOS 26.6
- Push mandatory update policies through MDM platforms such as Jamf, Intune, or Kandji
- Remove untrusted third-party applications and restrict sideloading on managed devices
Patch Information
Apple released fixes across seven advisories covering all affected platforms. Refer to Apple Security Advisory #128066, #128067, #128068, #128069, #128070, #128071, and #128072 for platform-specific patch details.
Workarounds
- No vendor-supplied workaround exists; installing the security update is the only supported remediation
- Limit installation of untrusted applications and enforce App Store or curated enterprise catalogs
- Apply the principle of least privilege by reviewing per-app permissions in Settings and revoking unnecessary access to Files, Photos, Contacts, and Location
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
