CVE-2026-28620 in Android
Summary
by MITRE • 09/08/2026
In multiple locations, there is a possible unauthorized URI access due to a permissions bypass. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.
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Analysis
by VulDB Data Team • 09/08/2026
The vulnerability described represents a critical security flaw characterized by an authorization failure that allows attackers to access Uniform Resource Identifiers (URIs) without proper authentication or permission checks. This type of defect falls squarely under the category of Improper Access Control, specifically aligning with CWE-284: Improper Access Control and often associated with CWE-862: Missing Authorization. In a typical secure system architecture, every request to access a specific resource must be validated against the user's assigned roles and permissions before any data is returned or action is executed. However, in this instance, the underlying application logic fails to enforce these boundaries effectively at multiple points within the URI handling mechanism. This oversight creates a direct pathway for unauthorized entities to traverse protected areas of the system that are intended to be restricted to authorized users only.
From an operational perspective, the impact of this vulnerability is severe because it facilitates local privilege escalation without requiring additional execution privileges from the attacker. Local privilege escalation occurs when a user gains access to resources or capabilities beyond their designated level within the operating system or application environment. The fact that no additional execution privileges are needed implies that the flaw can be triggered by simply sending specific HTTP requests or navigating to crafted URLs, rather than requiring code injection or remote command execution vectors. This significantly lowers the barrier for exploitation, making it accessible even to attackers with limited technical expertise who may only have basic network access to the target system. The absence of required user interaction further exacerbates the risk, as automated tools can exploit this flaw silently in the background without alerting administrators through suspicious human activity patterns.
The security implications extend beyond mere data exposure. By bypassing URI-level permissions, an attacker could potentially manipulate application state, alter configuration settings, or access sensitive internal APIs that are not exposed to public interfaces. This aligns with several techniques found in the MITRE ATT&CK framework, particularly T1078: Valid Accounts and T1528: Steal Application Access Token if such tokens are involved in the session management process. Furthermore, depending on how these URIs interact with backend services, this could serve as a stepping stone for more complex attacks such as Server-Side Request Forgery (SSRF) or cross-site request forgery variants where the attacker leverages the victim's authenticated context to perform actions they are not authorized to do. The lack of user interaction means that traditional monitoring tools relying on anomaly detection in human behavior may fail to detect this activity, allowing persistent unauthorized access to remain undetected for extended periods.
To mitigate this vulnerability, immediate remediation efforts should focus on implementing robust authorization checks at the application layer rather than relying solely on web server configurations or framework defaults. Developers must ensure that every endpoint and URI route is explicitly protected by middleware or decorators that verify the current user's permissions against a predefined access control list before processing any request. It is crucial to adopt a deny-by-default approach where all resources are considered inaccessible unless specifically granted permission. Additionally, implementing comprehensive logging and monitoring for unauthorized access attempts can help in detecting exploitation activities early. Regular security audits and penetration testing should be conducted to identify similar patterns of improper access control across other parts of the application. Finally, keeping all software components up to date with vendor-provided patches is essential as these updates often include fixes for such fundamental logic errors that compromise system integrity.