CVE-2025-26430 is a vulnerability identified in Google Android version 15, specifically within the getDestinationForApp method of the SpaAppBridgeActivity component. The root cause is a logic error that leads to a cross-user file reveal, meaning that an attacker with local access can bypass user boundaries and access files belonging to other users on the same device. This flaw constitutes an elevation of privilege (CWE-285), allowing an attacker with limited privileges to escalate their access rights without requiring additional execution privileges or any user interaction. The vulnerability is classified with a CVSS 3.1 base score of 7.8, indicating high severity, with attack vector local (AV:L), low attack complexity (AC:L), requiring low privileges (PR:L), no user interaction (UI:N), and impacts on confidentiality, integrity, and availability (C:H/I:H/A:H). The scope remains unchanged (S:U), meaning the vulnerability affects resources within the same security scope. The absence of known exploits in the wild suggests it is either newly discovered or not yet weaponized. However, the potential for local privilege escalation and unauthorized cross-user data access poses a significant security risk, especially on devices shared by multiple users or in environments where local access cannot be fully controlled. No patches have been linked at the time of publication, highlighting the need for vigilance and proactive mitigation.

The vulnerability enables an attacker with local access and limited privileges to escalate their privileges and access files belonging to other users on the device. This can lead to unauthorized disclosure of sensitive information, modification or deletion of critical data, and disruption of system availability. In multi-user environments such as shared devices, enterprise mobile deployments, or devices used in sensitive contexts, this flaw could be exploited to compromise user privacy and system integrity. The lack of required user interaction increases the risk of stealthy exploitation. Organizations relying on Android 15 devices could face data breaches, loss of trust, and potential regulatory consequences if sensitive data is exposed. The vulnerability also raises concerns for devices used in government, financial, healthcare, and critical infrastructure sectors where confidentiality and integrity are paramount.

Until an official patch is released, organizations should implement strict local access controls to limit the number of users with physical or local access to Android 15 devices. Employ device encryption and strong authentication mechanisms to reduce the risk of unauthorized local access. Monitor device logs and behavior for unusual file access patterns or privilege escalations. Use Mobile Device Management (MDM) solutions to enforce security policies and restrict installation of untrusted applications. Educate users about the risks of local device access and encourage prompt reporting of suspicious activity. Once patches become available from Google, prioritize immediate testing and deployment of updates across all affected devices. Additionally, consider isolating sensitive workloads or data on separate devices or containers to minimize cross-user exposure.