GHSA-9RHM-2H4X-JWMX A2A Java SDK send client credentials under server-controlled HTTP header name, enabling leakage via redirect

Impact. A malicious or compromised A2A agent can cause the client's API key credential to be forwarded to an arbitrary third-party server. The agent serves an AgentCard with an APIKeySecurityScheme specifying a custom header name, then responds with an HTTP redirect. The JDK HttpClient follows th...