CVE-2026-54598 in Wallos
Summary
by MITRE • 08/31/2026
Wallos is an open-source, self-hostable personal subscription tracker. Prior to version 4.9.4, endpoints/db/migrate.php executes database schema migrations when called over HTTP with zero authentication. Any unauthenticated attacker can trigger pending migration files against the live SQLite database. This issue has been patched in version 4.9.4.
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Analysis
by VulDB Data Team • 08/31/2026
The vulnerability identified in Wallos prior to version 4.9.4 represents a critical failure in access control mechanisms, specifically categorized under CWE-287: Improper Authentication. Wallos is an open-source application designed for tracking personal subscriptions, which inherently involves the storage of sensitive financial and personal data within its underlying SQLite database. The core technical flaw resides in the endpoint /db/migrate.php, which was configured to execute database schema migrations upon receiving HTTP requests without requiring any form of authentication or authorization tokens. This design oversight allows any unauthenticated actor on the network path between the client and the server to interact with this administrative function directly via standard web requests.
From an operational perspective, the ability to trigger pending migration files against a live production SQLite database poses severe risks to data integrity and availability. Database migrations are privileged operations intended for system administrators during deployment or upgrade phases. When executed by unauthorized parties, these scripts can alter table structures, drop critical tables, inject malicious schema changes, or corrupt existing records. In the context of an SQLite file-based database, such alterations can lead to immediate service disruption if the application code expects a specific schema that no longer exists after migration. Furthermore, depending on the content of the pending migration files and the privileges under which the web server process runs, there is a potential risk for further exploitation vectors, including privilege escalation or data exfiltration if subsequent endpoints are similarly misconfigured.
This vulnerability aligns with MITRE ATT&CK technique T1059: Command and Scripting Interpreter, as the migration scripts effectively execute database commands that modify system state. It also reflects CWE-648: Misuse of Special Elements related to unauthorized administrative actions. The lack of authentication for a high-privilege endpoint is a classic example of broken access control, where the application fails to verify that the user has appropriate permissions before performing sensitive operations. This type of flaw often arises from development shortcuts or misconfigured default settings in self-hosted applications where developers assume local network trustworthiness, which is rarely valid in modern threat landscapes involving exposed services on public-facing networks.
To mitigate this vulnerability and prevent similar issues, it is imperative to ensure that all administrative endpoints require strong authentication mechanisms, such as session-based cookies with secure flags or API keys validated against a centralized identity provider. The application should implement role-based access control (RBAC) to restrict migration functions exclusively to users with explicit administrator privileges. Additionally, defense-in-depth strategies should be employed, including network-level restrictions that limit access to administrative interfaces only from trusted IP ranges if possible, and ensuring that the web server process runs under a restricted user account with minimal permissions necessary for application functionality but not sufficient to compromise system integrity independently. Upgrading to version 4.9.4 or later is essential as this release patches the specific authentication gap in the migration endpoint, restoring proper access controls around sensitive database operations.