CVE-2026-53561: Apache Hive HiveServer2 SAML Bearer Impersonation

How to fix CVE-2026-53561: upgrade Apache Hive to 4.2.1. Unauthenticated SAML Bearer impersonation in HiveServer2 HTTP. Same 4.2.1 train as Metastore SQLi and Avro SerDe SSRF. Not RCE. Not the Kerbero