CVE-2026-43714 Overview
CVE-2026-43714 is an input validation vulnerability [CWE-20] affecting multiple Apple operating systems. A malicious application installed on an affected device can bypass sanitization controls and access protected user data. Apple addressed the issue with improved input sanitization in iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, visionOS 26.6, and watchOS 26.6.
The flaw requires local access and user interaction, limiting remote exploitation. However, the confidentiality impact is high because a compromised app can reach data normally protected by the operating system's sandbox and privacy controls.
Critical Impact
A malicious app installed on an affected Apple device can access protected user data by leveraging insufficient input sanitization within OS components.
Affected Products
- Apple iOS 26.6 and iPadOS 26.6 (prior versions)
- Apple macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6 (prior versions)
- Apple visionOS 26.6 and watchOS 26.6 (prior versions)
Discovery Timeline
- 2026-07-27 - CVE-2026-43714 published to NVD
- 2026-07-28 - Last updated in NVD database
Technical Details for CVE-2026-43714
Vulnerability Analysis
CVE-2026-43714 stems from improper input validation [CWE-20] in Apple operating system components that process data on behalf of applications. Apple's advisory notes only that the issue was addressed with improved input sanitization. The vulnerability allows a locally installed malicious app to reach protected user data that the operating system's privacy and sandbox layers are designed to isolate.
Exploitation requires local access on the device and user interaction, such as installing and launching a crafted application. The vulnerability affects confidentiality only; integrity and availability are not impacted. Apple has not identified in-the-wild exploitation, and the CVE is not listed in the CISA Known Exploited Vulnerabilities catalog.
Root Cause
The root cause is missing or insufficient sanitization of input processed by an affected OS component. When a malicious app supplies crafted input, the component fails to reject or normalize it, allowing the app to reference or retrieve data outside its authorized scope. Apple's patch adds stricter validation on the affected code path.
Attack Vector
An attacker must first deliver a malicious application to the target device, typically through social engineering or an installation prompt outside the App Store review process. Once the user launches the app, it invokes the vulnerable interface with crafted input. The operating system processes the input without sufficient validation and exposes protected user data to the app. No network access, elevated privileges, or credential theft is required.
No verified public proof-of-concept is available. Refer to Apple's advisories (HT128066 through HT128072) for the affected component list.
Detection Methods for CVE-2026-43714
Indicators of Compromise
- Installation of unsigned or side-loaded applications on managed Apple endpoints, particularly outside MDM-approved catalogs.
- Applications requesting or accessing user data categories inconsistent with their declared functionality.
- Devices running iOS, iPadOS, macOS, visionOS, or watchOS versions prior to the fixed releases listed in Apple's advisories.
Detection Strategies
- Inventory Apple endpoints and identify systems running OS versions below iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, visionOS 26.6, and watchOS 26.6.
- Correlate application install events with subsequent access to protected data stores such as Contacts, Photos, or Keychain.
- Review MDM compliance reports for devices out of compliance with the patched OS baseline.
Monitoring Recommendations
- Monitor endpoint telemetry for newly installed applications and cross-reference against approved software lists.
- Track OS version drift across the Apple fleet and generate alerts for devices that miss the patched release cycle.
- Review privacy consent prompts and permission grants for anomalies indicating an app is requesting unusual data categories.
How to Mitigate CVE-2026-43714
Immediate Actions Required
- Update all affected Apple devices to iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, visionOS 26.6, or watchOS 26.6.
- Enforce automatic updates through Apple MDM policies for enrolled devices.
- Restrict application installation to vetted sources and disable sideloading where feasible.
Patch Information
Apple released fixes across the affected platforms. Consult the vendor advisories for platform-specific package details: Apple Support 128066, Apple Support 128067, Apple Support 128068, Apple Support 128070, Apple Support 128071, and Apple Support 128072.
Workarounds
- Limit installation of third-party applications and enforce App Store or MDM-approved catalogs.
- Audit application permissions and revoke access to sensitive data categories for apps that do not require them.
- Isolate or retire devices that cannot receive the patched OS release.
# Verify current macOS build against the patched baseline
sw_vers -productVersion
# Trigger available software updates on macOS
sudo softwareupdate -i -a -R
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
