CVE-2026-113704 a2aproject a2a-rs Push Notification push_notification_sender.rs HttpPushSender server-side request forgery

A vulnerability has been found in a2aproject a2a-rs up to 0.4.3. This affects the function HttpPushSender of the file crates/server/src/pushnotificationsender.rs of the component Push Notification Handler. Such manipulation of the argument TaskPushNotificationConfig leads to server-side request...