CVE-2026-55263 in Android
Summary
by MITRE • 11/02/2026
In multiple functions of AllowBindAppWidgetActivity.java, there is a possible misunderstanding of reject/consent actions due to misleading or insufficient UI. This could lead to local escalation of privilege 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 AllowBindAppWidgetActivity component represents a critical flaw rooted in user interface design and state management logic rather than traditional code injection or memory corruption techniques. This issue specifically affects how an Android application handles permission requests related to binding app widgets, which are interactive UI elements that can be placed on the home screen of an Android device. The core technical deficiency lies in the ambiguity presented to the end-user during the consent process. When a third-party application attempts to bind with this activity, the system presents a dialog or interface requesting user approval for specific privileges. However, due to misleading labels, unclear phrasing, or insufficient contextual information within the UI elements, users may inadvertently grant permissions they did not intend to authorize. This misalignment between user intent and actual consent creates a pathway for privilege escalation where an attacker can manipulate the user into granting elevated access rights without requiring any additional execution privileges beyond what is normally required to launch the application.
From a technical perspective, this flaw exploits the trust relationship established during the initial installation or first-run experience of an Android application. App widgets often require significant system-level permissions to function correctly, including the ability to read user data, modify home screen layouts, and interact with other applications. When the UI fails to clearly distinguish between benign actions and those that could compromise privacy or security, users are likely to click through prompts without fully comprehending the implications. This is particularly dangerous because app widgets persist on the device after installation, allowing malicious actors to maintain a foothold in the system even if they do not have direct access to execute arbitrary code at runtime. The vulnerability relies heavily on social engineering principles embedded within the software interface itself, leveraging human cognitive biases such as click-through fatigue or confusion over technical terminology.
The operational impact of this vulnerability is significant, primarily concerning local escalation of privilege and potential data exfiltration. Once an attacker successfully tricks a user into binding their application via this flawed activity, they gain access to the permissions associated with that widget binding. This can include reading sensitive information stored on the device, such as contacts, messages, or location history, depending on what other permissions are bundled with the widget service. Furthermore, because app widgets run in the context of the host launcher or system UI processes, an attacker could potentially use this access to perform actions that appear legitimate from a user perspective, making detection difficult. The lack of additional execution privileges required for exploitation means that even low-privilege applications can leverage this flaw to achieve higher levels of control over the device environment, effectively bypassing standard sandbox restrictions through deceptive consent mechanisms.
This type of vulnerability is commonly categorized under CWE-20: Improper Input Validation when considering how user input (the click action) is processed without adequate verification of intent or context. More specifically, it aligns with CWE-693: Protection Mechanism Failure where the security mechanism designed to protect resources fails due to poor design choices in the interaction layer. In terms of offensive cybersecurity frameworks, this behavior maps directly to MITRE ATT&CK technique T1588.002: Obtain Capabilities - Exploit Public-Facing Application, specifically through social engineering tactics that manipulate user consent. It also relates to T1078: Valid Accounts if the widget binding allows access to existing system accounts or services without proper authentication checks beyond the initial UI prompt.
Mitigation strategies for this vulnerability must focus on both technical remediation and improved security design practices. Developers should immediately review the AllowBindAppWidgetActivity.java implementation to ensure that all permission requests are accompanied by clear, concise, and unambiguous language that accurately describes what data will be accessed or what actions will be performed. Implementing a step-by-step consent flow where users must explicitly acknowledge each specific privilege can reduce confusion. Additionally, applying principle of least privilege is essential; the widget binding should request only the minimum permissions necessary for its core functionality rather than broad access rights by default. Security testing processes should include usability security reviews to identify UI elements that might lead to accidental authorization. Finally, implementing runtime permission checks that re-validate consent before each sensitive operation can provide an additional layer of defense against exploitation attempts that bypass initial deceptive prompts.