CVE-2026-59006 in Android
Summary
by MITRE • 11/02/2026
In getTouchOcclusionMode of WindowState.java, there is a possible tapjacking issue due to a tapjacking/overlay attack. This could lead to local information disclosure with no additional execution privileges needed. User interaction is needed for exploitation.
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Analysis
by VulDB Data Team • 11/02/2026
The vulnerability identified in the Android operating system's WindowManagerService component specifically within the getTouchOcclusionMode method of WindowState.java represents a significant security flaw related to touch input handling and window layering logic. This issue stems from an improper validation or state management mechanism when determining whether a specific window is occluded by other windows on the screen. In modern mobile operating systems, particularly Android, the concept of touch occlusion is critical for ensuring that user interactions are directed only at visible and intended UI elements. When this check fails or is bypassed due to race conditions or logic errors in how overlay permissions and z-ordering are processed, it creates a pathway for tapjacking attacks. Tapjacking, also known as clickjacking on mobile devices, involves tricking users into clicking on something different from what they perceive, often by placing an invisible or semi-transparent window over the legitimate application interface to capture their input events intended for the underlying app.
From a technical perspective, the flaw lies in how the system calculates and enforces touch occlusion modes during dynamic UI updates. If the WindowManagerService does not correctly synchronize the visual rendering state with the event dispatching logic, an attacker can exploit this discrepancy by injecting malicious overlay windows that sit above legitimate application layers but are incorrectly flagged as non-occluding or transparent to input events in a way that allows them to intercept touches meant for sensitive UI controls. This misalignment between what is visually presented and how touch coordinates are mapped to window targets enables the execution of unintended actions. The attacker typically achieves this by leveraging accessibility services, overlay permissions granted by users during routine app usage, or exploiting system-level privileges if available in specific contexts. The core technical failure is a lack of robust verification that ensures only legitimate, non-malicious overlays can intercept touch events without proper user consent or visual indication.
The operational impact of this vulnerability centers on local information disclosure and potential unauthorized actions performed under the context of the victim's current session. Since tapjacking relies heavily on social engineering elements where the user must interact with the device, the exploitation requires direct user interaction. However, once triggered, it can lead to severe consequences such as credential theft if a login screen is overlaid, financial loss through fraudulent transactions in banking applications, or unauthorized changes to security settings like disabling lock screens or enabling developer options. The ability to disclose local information arises because intercepted inputs might reveal sensitive data entered by the user, such as passwords, PINs, or personal messages, which are then transmitted to an attacker-controlled server. This is particularly dangerous on mobile devices where users frequently handle highly sensitive financial and personal information without realizing their interactions have been hijacked.
In terms of industry standards classification, this vulnerability aligns with CWE-1021: Improper Restriction of Rendered UI Layers or Frames, which covers issues related to clickjacking and overlay attacks on web and mobile interfaces. It also relates closely to CWE-847: Incorrect Implementation of Protocol for Determining Ownership, as the system fails to correctly determine ownership of touch events when multiple windows are involved. From a threat modeling perspective using MITRE ATT&CK framework, this falls under T1053 - Scheduled Task/Job or more specifically techniques associated with UI Redressing and Input Capture within mobile environments, often categorized under Mobile Application Security flaws that allow for privilege escalation through social engineering vectors. The attack vector is classified as local because it requires the attacker to have some level of presence on the device, either by installing a malicious application or exploiting another vulnerability to gain overlay permissions.
Mitigation strategies must focus on both system-level hardening and developer best practices. For operating system vendors like Google, patching involves strengthening the WindowManagerService logic to ensure that touch event dispatching strictly adheres to visual occlusion states, preventing any window from intercepting touches unless it is explicitly designed for such interaction with proper user consent mechanisms in place. This includes enforcing stricter checks on overlay permissions and ensuring that transparent or invisible windows cannot capture input events intended for underlying applications without clear visual feedback to the user. For application developers, mitigating this risk involves implementing anti-tapjacking measures within their own codebases. These include detecting if an accessibility service is active with high privileges, monitoring for unexpected window overlays using methods like checking for FLAG_NOT_TOUCHABLE or verifying z-ordering dynamically during touch events. Additionally, displaying a visible indicator when sensitive operations are being performed can help users recognize potential tapjacking attempts. Regular security audits and penetration testing focused on UI interaction flows are essential to identify such logic flaws before deployment in production environments.