A security vulnerability has been detected in a2aproject a2a-python up to 1.1.3. This affects the function dispatchnotification of the file src/a2a/server/tasks/basepushnotificationsender.py of the component Push Notification Sender. The manipulation of the argument pushinfo.url leads to server-side request forgery. Remote exploitation of the attack is possible. Upgrading to version 1.1.4 is able to mitigate this issue. It is suggested to upgrade the affected component.