CVE-2026-86887 in iOS
Summary
by MITRE • 09/15/2026
A privacy issue was addressed by removing sensitive data. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, visionOS 27. An app may be able to bypass certain Privacy preferences.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 09/15/2026
The disclosed vulnerability represents a significant privacy control failure within the operating system's application sandboxing architecture, specifically affecting iOS, iPadOS, and visionOS environments. The core technical flaw lies in an improper enforcement of access controls that allows applications to circumvent user-defined privacy preferences. In modern mobile operating systems, privacy settings such as location services, camera access, microphone usage, and photo library permissions are enforced through a system-level mediation layer that intercepts API calls from third-party apps. When this mediation logic contains a bypass mechanism, an application can request or retrieve sensitive data without triggering the standard permission prompts or respecting previously denied user choices. This indicates a breakdown in the principle of least privilege, where the operating system fails to act as a strict gatekeeper between the application runtime and protected resource namespaces.
From a technical perspective, this issue likely stems from insufficient validation checks within the privacy framework APIs. An attacker could exploit this by crafting an app that leverages specific API calls or background processes to access data stores associated with sensitive categories like personal health information, precise location history, or contact lists without explicit consent. The vulnerability enables unauthorized exfiltration of personally identifiable information (PII) and other sensitive user data. Because the bypass occurs at the system level rather than within a single application's code logic, it undermines the trust model that users rely on when configuring their device settings. Users who have explicitly denied access to certain resources may find those protections rendered ineffective, leading to potential surveillance, profiling, or identity theft scenarios if malicious actors distribute apps designed to exploit this flaw.
The operational impact of this vulnerability is severe due to its direct implication for user privacy and data sovereignty. It allows for the silent collection of sensitive information that users have intentionally withheld from applications. This can lead to violations of regulatory frameworks such as GDPR, CCPA, or HIPAA, depending on the jurisdiction and the type of data accessed. For enterprise environments deploying managed iOS devices, this flaw poses a risk to corporate data security if employees use compromised apps that inadvertently leak sensitive organizational information stored locally on the device. The persistence of this issue across multiple major version lines suggests it may be rooted in legacy code paths or fundamental architectural decisions within the privacy subsystem that require comprehensive refactoring rather than simple patching.
Mitigation strategies primarily involve immediate software updates to the specified versions, including iOS 26.7, iPadOS 26.7, iOS 27, iPadOS 27, and visionOS 27, which contain the necessary code corrections to restore proper access control enforcement. For organizations unable to update immediately due to compatibility constraints, strict application whitelisting policies should be enforced via Mobile Device Management (MDM) solutions to prevent the installation of unverified or high-risk applications that might attempt such bypasses. Additionally, users are advised to regularly audit app permissions and revoke unnecessary access rights as a defensive measure against potential exploitation by other vulnerabilities in different apps.
This vulnerability aligns with CWE-284, which describes Improper Access Control, specifically where the system fails to restrict actions for unauthorized entities. It also maps closely to MITRE ATT&CK technique T1530, Data from Local System, as it facilitates the collection of data stored on the endpoint without proper authorization. Furthermore, the behavior resembles aspects of T1217, Browser Information Discovery, if the bypass allows access to browser history or cookies, though in this context, it broadly applies to any sensitive data category protected by privacy preferences. Addressing this issue is critical for maintaining the integrity of the mobile security ecosystem and ensuring that user-configured privacy boundaries are technically enforced rather than merely informational.