CVE-2026-84628 in iPadOS
Summary
by MITRE • 09/15/2026
An authorization issue was addressed with improved state management. This issue is fixed in iOS 27 and iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, watchOS 27. A sandboxed app may be able to access the System Keychain.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability described constitutes a critical authorization bypass within Apple's operating system ecosystem, specifically affecting iOS, iPadOS, macOS, tvOS, visionOS, and watchOS versions prior to their respective 27 releases. The core technical flaw lies in inadequate state management during the authentication and authorization processes that govern access to sensitive system resources. In secure computing environments, particularly those utilizing sandboxing mechanisms like Apple's App Sandbox, applications are strictly confined to a limited set of file paths and system services to prevent unauthorized data access or modification. However, this issue reveals a lapse where the internal state tracking for keychain access requests was not properly validated against the app's declared entitlements before granting permission. This allows a sandboxed application, which should theoretically be restricted from accessing high-privilege areas of the operating system, to successfully interact with the System Keychain.
The System Keychain serves as the primary secure storage mechanism for credentials such as passwords, encryption keys, certificates, and other sensitive authentication data across Apple devices. By exploiting this state management flaw, a malicious or compromised sandboxed app can bypass standard security boundaries that are designed to isolate untrusted code from privileged system components. This represents a significant escalation of privilege in the context of application isolation, effectively allowing low-privilege processes to read high-value secrets stored by other applications or the operating system itself. The ability to access the System Keychain undermines the fundamental trust model of mobile and desktop computing platforms, where sandboxing is relied upon to contain potential breaches within a single application's boundary.
From an industry standard perspective, this vulnerability aligns closely with CWE-269, which describes Improper Privilege Management, specifically regarding the failure to enforce proper authorization checks before granting access to sensitive resources. Furthermore, it relates to CWE-732, which pertains to Incorrect Permission Assignment for Critical Resource, as the system failed to correctly assign or verify permissions based on the application's sandboxed state. In terms of offensive security frameworks such as MITRE ATT&CK, this behavior is indicative of techniques associated with Credential Access and Defense Evasion. An attacker leveraging this flaw could employ tactics similar to T1552.004 (Unsecured Credentials: Private Keys) or T1003.008 (OS Credential Dumping: Security Account Manager), although in this specific context, the target is more accurately described as stealing stored credentials from other applications rather than dumping system account hashes directly.
The operational impact of this vulnerability is severe for both end-users and enterprise environments relying on these devices for sensitive operations. If an attacker can inject or install a malicious app that exploits this flaw, they could exfiltrate user passwords, session tokens, API keys, and cryptographic material stored in the keychain. This data theft facilitates further attacks such as account takeover, unauthorized financial transactions, or lateral movement within corporate networks if enterprise credentials are compromised. The breadth of affected platforms means that users across all Apple device types are potentially exposed, increasing the attack surface significantly.
Mitigation for this vulnerability requires immediate action by system administrators and end-users to update their devices to iOS 27, iPadOS 27, macOS Golden Gate 27, tvOS 27, visionOS 27, or watchOS 27, as these versions contain the necessary patches that correct the state management logic. For developers, it is crucial to ensure that applications strictly adhere to declared entitlements and do not attempt to access resources outside their sandboxed scope without proper authorization flows. Security monitoring tools should be configured to detect anomalous keychain access patterns from unexpected processes or apps lacking appropriate privileges. Continuous patching cycles are essential to address such privilege escalation flaws, as they represent a direct threat to the confidentiality and integrity of stored credentials on modern computing platforms.