CVE-2026-43800: Apple iPadOS Information Disclosure Flaw

CVE-2026-43800 Overview

CVE-2026-43800 is an information disclosure vulnerability affecting multiple Apple operating systems. An app installed on the device may be able to access sensitive user data. Apple addressed the issue by removing the vulnerable code in iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, and watchOS 26.6.

The weakness is categorized under [CWE-200] Exposure of Sensitive Information to an Unauthorized Actor. Exploitation requires a local attack vector and user interaction, limiting mass exploitation potential but retaining risk in targeted scenarios where a malicious application is present on the device.

Critical Impact
A local application can read sensitive user data outside its expected access boundary, breaking Apple's application sandbox confidentiality guarantees.

Affected Products

Apple iOS and iPadOS versions prior to 26.6
Apple macOS Tahoe prior to 26.6
Apple tvOS prior to 26.6 and watchOS prior to 26.6

Discovery Timeline

2026-07-27 - CVE-2026-43800 published to the National Vulnerability Database (NVD)
2026-07-29 - Last updated in NVD database

Technical Details for CVE-2026-43800

Vulnerability Analysis

CVE-2026-43800 is an Information Disclosure vulnerability that allows a locally installed application to access sensitive user data that should be protected by the operating system. Apple's advisory states the issue was addressed by removing the vulnerable code, indicating the affected code path was not required for platform functionality and could be eliminated rather than refactored.

The vulnerability spans Apple's shared component base across iOS, iPadOS, macOS Tahoe, tvOS, and watchOS. This suggests the flaw resides in a common framework or system service reused across Apple platforms. The attack surface includes any process capable of invoking the affected code path from user space.

Because exploitation only breaches confidentiality, integrity and availability of the system are unaffected. However, the disclosed data may include credentials, tokens, or personal information usable in follow-on attacks.

Root Cause

The root cause maps to [CWE-200], where a component exposes sensitive information to an actor that is not explicitly authorized to receive it. Apple has not published low-level technical detail, but the remediation approach (code removal) implies the exposed data path served no legitimate purpose and represented an unintended leak from a system component to unprivileged application contexts.

Attack Vector

Exploitation requires a local attack vector with user interaction. An attacker must deliver and have the user install or run an application on the target device. Once running, the application invokes the affected code path to retrieve sensitive user data that would otherwise be gated by sandbox controls or entitlement checks. Remote, network-based exploitation is not applicable to this issue.

Detection Methods for CVE-2026-43800

Indicators of Compromise

Installation of unsigned or side-loaded applications on managed Apple devices prior to patch deployment.
Applications requesting or accessing entitlements inconsistent with their advertised functionality.
Unexpected outbound traffic from third-party apps carrying user data (contacts, credentials, identifiers) shortly after installation.

Detection Strategies

Inventory Apple endpoints using MDM telemetry and flag any device running iOS, iPadOS, macOS, tvOS, or watchOS below version 26.6.
Monitor MDM and EDR logs for application installations from outside the App Store or from developer-signed provisioning profiles.
Correlate process execution telemetry with network egress to identify apps exfiltrating structured user data.

Monitoring Recommendations

Enforce application allowlisting on managed macOS fleets and review installed app inventories on iOS and iPadOS through MDM.
Track OS version compliance dashboards and alert on devices that fail to move to Apple's 26.6 release train.
Review Unified Log entries on macOS for anomalous access to privacy-protected data stores by non-system processes.

How to Mitigate CVE-2026-43800

Immediate Actions Required

Update all affected Apple devices to iOS 26.6, iPadOS 26.6, macOS Tahoe 26.6, tvOS 26.6, or watchOS 26.6.
Push updates through MDM using enforced software update policies to eliminate user-deferred patching.
Audit installed third-party applications on unpatched devices and remove any of unknown provenance.

Patch Information

Apple has released fixes across its platform family. Refer to the vendor advisories for full component and version details: Apple Security Advisory #128066, Apple Security Advisory #128067, Apple Security Advisory #128068, and Apple Security Advisory #128069. The fix removes the vulnerable code path entirely.

Workarounds

Restrict application installation to the App Store and vetted enterprise distribution channels until patches are deployed.
Disable or remove third-party apps that are not business-critical on devices awaiting update.
Educate users to avoid installing applications from untrusted developers or configuration profiles.

bash

# Verify installed OS version on macOS before enforcing policy
sw_vers -productVersion

# Trigger available Apple software updates on macOS
sudo softwareupdate --install --all --restart