A vulnerability was found in DTStack Taier up to 1.4.0 . It has been declared as critical . The affected element is the function preHandle of the file taier-data-develop/src/main/java/com/dtstack/taier/develop/interceptor/LoginInterceptor.java of the component Source Connection Test Endpoint . Executing a manipulation can lead to improper authentication. This vulnerability appears as CVE-2026-11618 . The attack may be performed from remote. In addition, an exploit is available. A patch should be