CVE-2026-4249

A missing authentication enforcement vulnerability exists in the mutual TLS (mTLS) implementation used by System REST APIs and SOAP services in multiple WSO2 products. Due to improper validation of client certificate–based authentication in certain default configurations, the affected components may permit unauthenticated requests even when mTLS is enabled. Successful exploitation allows a malicious actor with network access to the affected endpoints to gain administrative privileges and perform unauthorized operations.

In WSO2 products, when internal roles are removed from a user, the system fails to invalidate previously issued authentication tokens. Users may retain access privileges even after role revocation.

The Class Mediator in WSO2 products fails to properly validate or sanitize messageContext properties used for dynamic values. Authenticated users may access or modify data across invocations.

When an Event Publisher output adapter is configured with irrelevant properties, the affected products log these properties without sufficient validation or sanitization. An attacker with access to 'wso2carbon' log files could retrieve sensitive information, such as credentials, potentially leading to unauthorized access.

The system accepts authentication requests without sufficient validation to enforce tenant isolation when using Email OTP, SMS OTP, or Magic Link as first-factor authenticators. This can lead to exposure of personally identifiable information of users in different tenants.

When secondary user stores are configured, the implicit-association resolver incorrectly initializes from a secondary user store and bypasses the primary user store during search and uniqueness checks. This can lead to associating a subject with an unintended local account if the same lookup claim exists in both stores.